Ok.. So.. I can't tell you too much about the price of a four door Wrangler, but.. Yes, all wranglers/cjs will ride fairly rough. I've never ridden in one with 35's though, so that might have something to do with it. In my honest opinion, before you drop 17K.. Go look at a 2000/2001 Cherokee (XJ). Yeah, its older. But nice ones can usually be had for around 4-5k, and you'll have all that money left over to build it up the way you want it. Added bonus(es)- My 2000 XJ (Cherokee) rides nicer and is a LOT quieter than the 2000 TJ (Wrangler) that my parents had. In fact, three weeks ago they gave my sister the choice of either taking the wrangler as her first car and they would fix the few small mechanical bugs in it, or they would trade it on a 1999 XJ for her. Well, after riding in and driving mine, she chose the XJ.
Another bonus- since the Cherokee is considered a station wagon, insurance is a LOT cheaper. (Ours was, anyway.)