Go with a Hemi. I have a 2007 4.7L and I must say, the power is a lot nicer over a V6, but from what I've heard the gas mileage is about 1-2mpg between each model. And trust me, you want 4wd, especially if you get the Hemi. It's nice coming up to red lights and some ******* in a ricer next to you thinks he can beat you and your 4wd helps you grip that road while he's in your rear view mirror still squealing and slipping.
Another thing I would also go back on if I had the chance, make sure the 4wd is Quadra-DriveII. My QTII is fine but those lockers make a difference.
~Black WK Club Member #9~
2011 WKII Overland
2007 WK Limited[/COLOR]
1995 YJ Rio Grande