Before you buy new and get a lifetime warranty, consider what you will have modified on the vehicle. The reason I say this is because there have been far too many owners getting shafted for performing a mod (lift, or something) and being rejected for warranty work. Granted the magnuson moss act states they have to prove it, and so does the policy that the dealerships are to follow. But just really think long and heavy on getting any warranty, especially if you're getting a Wrangler you're going to mod.
If you buy one, I would suggest a Rubicon or the Hard Rock model and 2012+ (one with the 3.6L). I've driven both the 3.8L and 3.6L, as I believe most people here have. Hands down if I were to re buy my first Jeep I would have bought one with the 3.6L under it. I did run my 3.8L to 160k with very little issues mechanically (water pump, starter, alternator were replaced at 140k).
Wranglers from my understanding have a very high resale value in general, higher than most vehicles.