If you like turning wrenches, you'd be better off with a D2. The LR3 issues can be computer related a lot of the time. Wait until there's a suspension fault and you have to drive home on the bump stops. You'll wish you were in a coiler.
Start with a mild 2" lift and shocks. Even an '04 will have sagged a little by this time. Fix all the regular service items, like the front drive shaft, and save the rest for repairs that popup in the first few months. Tires are good too, if you're looking to hit some trails right away. Then start low and go high for armor/protection. Get some diff guards, sliders and then bumpers. It might take you a few years to get here and be happy at that.
If you go out a few times and think you'll really want to build up the rig, start getting those higher end pieces of kit from the start. I went through too many sets of (continuously bigger) tires, springs, and shocks in my first few years. Admittedly, I was totally new as well and didn't know how hard the bug would bite. From the get go, I should have gone with the 7100's, 33" with 3" RTE springs and 1" spacers. But that leads down a rather large rabbit hole with trailing/radius arms, drive shafts, brake/ABS lines, track rod, drag link, Panhard bar, HD axles, lockers, 4.14 gears etc. You get the idea.
Being 6'4" I was also concerned about leg room. A couple pieces of flat stock and a 4 holes will let you extend the driver's seat back to give you ample room.