i'd get a DEH-P480MP. $145 shipped on ebay, higher pre out voltage, just as good if not better features...ect. just not as flashy with the OEL screeen and all. unless flashy is what you are going for or are concerned about warranty.
or for $333 shipped on ebay, you could get the DEH-P880PRS. excellent unit. i just got one and love it. got just about anything you could ever need. the 780 and 7800's are right below, but don't know a price off the top of my head.
I have that deck and I love it. Great look and controls without the annoying jog dial of the 6800. You can get it cheaper elsewhere though. If you're not into ebay, I got mine from Cardomain.com, fairly quick shipping and free dash kit and wire harness just like Crutchfield. Here's the link: