If your gonna drive it everyday, go w/ the 6cyl and a tj.
Cj (round lights, yj (square lights) both have leaf springs and are cheaper to lift.Tjs (round lights) I think are 97 and present have coil springs =ride nicer and nice looking inside. If you can find a rubicon they are built a bit tougher w/ stronger axles.
This is my first jeep and it is a blast. 92 w/ only a 4cyl but I only paid $1,200 for it. I only have this as a tagged toy -not daily driven.
...now this I'd drive everyday!
...Here's a good site w/ some useful FAQs
http://www.jeepsunlimited.com/forums/forumdisplay.php?f=164