Kdc-x991 for a JVC-AVX77?

i was thinking of upgrading my Kenwood kdc-x991 for a JVC KD-AVX77. Anybody think this a good swap. I like fact that its a single din, all touch screen and play dvds. My x991 sometime don't read or work properly once it gets hot or even in a hot sunny day. I had have bad experience with jvc hu in the past though not sure about this new one. Anybody have the kd-avx77 yet, if so how is the sound quality and user control? Crutchfield and sonicelectronic listed it for $599 which is the retail price for the HU, ebay has it for $438 shipped (cheapest).