Thanks for your replies. Frankly, I'm probably crazy to buy either of these vehicles. I live in Bend, OR. The closest LR dealership is 3 hours away in Portland, and the closest Lexus dealership is 2.5 hours away in Eugene. If something happens that requires warranty service, I'll have to drive a long way for it (assuming the vehicle can drive; if not, it will have to be towed a long way, which means more time without it).
Perhaps I'm better off buying a used Defender that is either out of warranty or close to it. In that case, I'd be paying for repairs anyway and wouldn't have a reason to take it to the dealership. There's a highly regarded Land Rover repair shop here.
If anyone can think of another vehicle that can tow >7,500 lbs, has a luxury interior, and isn't a huge SUV, let me know!
Toyota Tundra 1794! It tows 10k+ Toyota dealer in town too! Haha