I have a CDA-7863. It is a great deck. As for the 7864, it puts out 60x4, which is the same as my deck, but the 7864 is blue. kcobra is thinking of the 7862, which looks identical to the 7863, but only has a 45x4 amp. If you are looking at Alpines, you may want to wait until april. The new models will be out (CDA-787?) . The new ones look better, have 3 4volt outputs, and have a newer cleaner amplifier type. I just sold my CDA-7863 and will buy a new Alpine in april. I highly recommend Alpine to anybody, I've never had problems with thier decks.
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The Honkeytonk Monkey
Jewel Green 96se MTX