Welcome.
quite a few things going on here.
you can fit cragar soft 8s but they are heavy. Not good for MPGs (if that matters)
16 is going to be the best size with 235 75 16 being the biggest tire you can probably fit.
If you want to lift there are afew options out there. Checkout
http://www.jeepinbyal.com/ for all the options there. The daystar kit will not change the ride quality that much, but the stock ride is actually pretty bad, all I've owned is SUVs and trucks. Go with the OME lift or the JBA lift. Either one will improve ride quality.
I have also setup my stereo system pretty well and its a great car to modify. Good luck with everything