I picked up the DF-88 (the first one with the cool day/night display) when they first came out, just over 2 years ago...still have it. It's probably one of the best units I've owned. Not a single probelm yet.
i have a panasonic 909dvr, that is their dvd/cd player. i think it is the one being mentioned on the post above. i love it, it is the best money i have spent on my truck. if you want one i can line one up for you for about $550. email me and let me know. here is a link to some pics