get the 7893... and add the 6 disc MP3 changer if MP3's are a real concern... its one sweet ass deck.
The Sony & Pioneer wont even touch the sound quality the Alpine has... Ive never had much luck with regular sony products lasting... thier old ES stuff was great... before they came out with that xplod crap. Pioneer is really a waste of money, and Sony is too now-a-days.