FYI, I added 1/2 inch prg spacers on top of my recently installed OME coilovers last night, and you will get minimal CBC (at least I did). You really have to try to get the UCAs to contact the bucket though, as I've only been able to hear it when I almost jumped a speed bump. So far in daily driving and rough dirt roads I haven't gotten any CBC from the addition of the spacers. Also, the stance with the spacers is much more aesthetically appeasing than without. Less rake and noticeably more clearance in the front.
That is encouraging. Mo4130 is considering adding in the PRG spacers on top of the OME kit to get a little more clearance. I drive like an old lady around town, so knowing speed bumps aren't a big problem at 2" is very encouraging. I wouldn't mind it a lot off road, since on the technical stuff it would be bumpy anyway, and I'd be installing UCA bumpstops to minimize the shock and noise from impact. Thanks for the info!
I'd go with the Nisstec coilover over the OME. A buddy of mine got the comparable ToyTec (Nisstec's big brother company) coilover on his Tundra and they blew me away. Way outperformed my TJM coilovers. The ride was excellent as well. I'm also fairly certain that the 5100 series Bilstein can be factory rebuilt if needed. But then you also need to consider that your very close to the cost of true coilover at that point. The difference between $690 and $7xx for Radflos is not that much, I know you said you didn't want to be wanting on having things rebuilt but you can rebuild them yourself in a day and for under $100. Way cheaper than buying all new shocks.
Just some food for thought
Glamis, thank you for the info! Everything helps.
Glad to hear you were impressed with the quality of the Toytec setup, even over your own TJM coilovers. That is a surprise actually. I know the cost at this point is going to be very similar between the Nisstec and Radflo. To be honest, I just don't want to rebuild my shocks later on. I'd rather just be able to take the assembly off, buy some new Bilsteins, have a shop put the springs on the new shock, and reassemble. I'm lazy.
Thanks again everyone for the info! I really appreciate all the help. Just got off the horn with Chris at Nisstec. I just have to say, what a super helpful guy. Very knowledgeable and very helpful. Anyway, I had a chat with him about what I'm looking to do. He gave me great info on the Nisstec coilover and ran through some technical things with me. Before I called him, I got the floor jack and HiLift out again and did some looking and measuring. I now have a pretty good idea about what my needs are and what direction I'm going to go with the front suspension.
Here's what I learned: The OME system comes with a 1 year warranty as far as I remember. The Nisstec coilover is literally a Bilstein 5100 with some CNC machined parts to add a coil spring to it. I'm a huge fan of Bilstein shocks, they are great quality for the price. They carry a limited lifetime warranty. The springs they use are Eibach springs, which is the same thing the Radflo coilovers come with. They are super high quality and carry a limited lifetime warranty. You can get either a 500lb or 600lb spring. The 600lb spring has pretty much the same spring rate as the Old Man Emu HD spring. As far as ride quality goes, the OME and Nisstec are very, very similar. And because the Nisstec uses the same springs as the Radflo, the difference there isn't that much either.
Your options for lifts that will work well with stock UCAs are Old Man Emu, Nisstec, and the OE Radflo. The OME front kit is $651 (assembled), the Nisstec is $690, and the OE Radflo is $748. So they're all right in the same ballpark as far as price.
-The beauty of the OME kit is you install it and forget about it. If you need a new shock, buy a new shock. The downside being that whatever lift you get is what you're stuck with unless you add a spacer. But the spacer options are only 1/2" or 1". That's where the Nisstec comes in.
-The Nisstec is a similar quality setup, with the same maintenance simplicity as the OME, but gives you the option to adjust the lift height
anywhere between 0" and 2". You can adjust either side independently, so you can easily fix a side to side difference. In my opinion, the Bilstein shock in the Nisstec system would be better for a touring/overlanding truck than the Radflo, as the shock is designed for more day to day use as well as being easier to find if you need a replacement.
-The Radflo is fully adjustable, just like the Nisstec, but the shock is now a rebuildable one. This is a good thing for people who want that ability, and the Radflo shock will be a more race-oriented, high performance shock, so it will be happier than the Bilstein when you're bombing along those forest service roads.
Here's what I have decided: I want my lift right at 1.75". This will give me the most ground clearance with the least chance of coil bucket contact. I think 1.5" is not quite enough, and 2" runs you the risk of making coil bucket contact happen often. Right in the middle is perfect. I cannot do this with the OME kit. I'm also really anal about side to side height differences, which would be impossible to adjust with the OME kit. So I will be getting the Nisstec coilovers. I really like Bilstein shocks, and I've never heard of problems with Eibach springs. The extra $49 gives me adjustability while still giving me parts I have experience with. Sounds worth it to me.