I believe you are interested in popular Land Rovers readily available here in the USA.
That would be the Discovery line. The D1 (94-99), the D2 (99-04), the LR3 (2005-2009), and the LR4 (2010-present). These vehicles are readily available and are very capable. Great for light traveling around the US. Aftermarket upgrades are readily available for all of these trucks and many decent examples are available through normal automotive purchasing channels. On top of that, built examples are available in various for sale sections.
FYI, I'm a LR3 fanboy so that is what I'm going to tell you to go find. Get a 07 or an 08. 05 and 06 are good trucks but I feel like by 07 they got the majority of the bugs worked out. The advantage of the LR3 is space, power, reliability, and comfort. Search this forum for information on the LR3.
However the D1 and D2 are both great trucks. I've seen moderately built D2's do all kind of awesome stuff off road. A D1 with traction aids in the diffs is also quite a beast.
Defenders are awesome. However I wouldn't say they are readily available. Also due to the great scare of 2013, only trucks with original frames and engines are coming in. Personally for me, the appeal kinda goes to crap when trucks with a history of rotting out the chassis and dogs of engines are the only ones readily available...overseas that I now need to import. Great trucks nonetheless but you REALLY need to know ****** you are doing. If you don't you could end up with a truck you don't like that just sits in your driveway taking up space (see it all the time with Series trucks, just waiting for it to happen to defenders).
LR North America did import Defenders legally into the US for a number of years. The Defender 110 was imported in 1993. The Defender 90 in the years 94, 95, 97. Don't even worry about the 1993 Defender 110s. They fetch a premium price. The 94, 95, and 97 trucks can be had for $25~$45k and are usually REALLY nice trucks. BTW these are called "NAS" trucks. Typically not seen in normal automotive selling channels but you can search defender specific forums for vehicles for sale.
If you primarily travel solo or travel light, a D90 is great. A D110 really comes into play when you start carrying a bunch of crap when you go off roading.
I see you are a Jeep Guy. Typically people are like, take a JK 4 door, strip out everything below the frame, install bolt on long arms, Dana 60s, and 37" tires. Then go hit the Rubicon. Don't expect this from a rover. What you can expect is to install a ~2" lift, a wee bit bigger tire and go have a BLAST on the easier trails. Also if fire roads are prevalent in your neck of the woods, then such a vehicle is great for that.
Example here in Georgia. There are TONS of forest service roads and a lot of cool places to go see. However they are 90~120 minutes from here. Then most of the roads are in fairly good shape. There are a few that offer a challenge but not like, a challenge-challenge. A D1/D2/LR3/LR4 would be PERFECT for this. You just cruise along, enjoying everything but if there is a washout or whatever, you just grab low range, cross it, keep going. Then enjoy a nice, comfortable, climate controlled ride home on the interstate...not needing noise cancelling earphones.
The early Range Rovers (now known as range rover classics, RRC) which were imported between 1987-1995 are also great trucks. FYI the 1995 year is very desirable. However they are just as awesome as the earlier trucks. Pretty much don't worry about any of the other range rovers after that.
Now the Range Rover Sport is a cool truck (up until 2013, dunno anything about its replacement model afterwards). Been seeing them down in Australia tearing it up. I have heard bad things about the back seat and full size humans riding in it. However if this isn't a concern, then it is a contender. Also aftermarket is somewhat limited. Sure you can get a lift and tires, but after that, things get scarce.
If you enjoy being a bitter crazy quirky person who can relate to Clint Eastwood's character in the movie, "Gran Torino", then come join us as a Land Rover Series Owner. These are the old, boxy, rough trucks. Available in the US starting around 1963ish to 1974. Also readily imported and they are fairly plentiful. You can find a GREAT truck for under $15k. That said, its still a series truck. You need to be able to turn your own wrench and be prepared for little issues...and big issues. I'd say its similar to a CJ5 that you just kinda keep going.
So there. That is what I think on the Land Rovers available here in the US.