Yeah look into getting a stainless steel Exhaust system.
I put a dynomax muffler and aluminum tail pipe on mine.
You might also want to look into getting a slip yoke eliminator. It will allow for a longer rear drive line helping out the angle. Usually any more lift than 3 inches of lift you would need one. You may be able to get away with a transfer case drop and a motor lift. Thats is what I am running currently but I plan on getting the slip yoke eliminator soon.
Here is a good price on a sye/rear drive line combo
http://www.allmyneeds.com/en-us/p_202.html
Comes with a good driveline....
Jeepforum.com is a good place to learn about your jeep.
another one that i like is
www.jeepsunlimeted.com its a little bigger.
Jer