i've been doing a little research on 2006-08 commanders as i'm considering purchasing one. i've test driven one a few times and do like them. i previously owned an older grand cherokee and ready to back to jeep and sell my pathfinder. questions: are there known issues with any of the '06, '07, or '08 limited 4x4 models with the 4.7L engine? issues with quadra-trac or quardra-drive? i have read that the commander ranks low in reliability in the jd power surveys, but it seems the rankings are much higher in the owner surveys. as such, my though is to get an after-market warranty with any commander i purchase. any thoughts, suggestions, recommendations, and feedback would be greatly appreciated.