The WJ Grand Cherokees (99-04) are great Jeeps. My wife has an '04 with the 4.7L v8 and the 5 spd auto, and she loves it. We've only had it since July, but it's got over 60k on it now with no issues. I've heard that the 4.7 is also a very reliable motor, and as long as you can keep your foot out of the go pedal, you can get great mileage with it (25+ on the highway). The 4.0 I6 is plenty of motor to get the grand cherokee going though, and that is a wonderful motor.
Check this site out for more info on the 99-04 Grand Cherokees:
www.wjjeeps.com
- Justin