the 7995 is a 7894 without an internal amp and a silver face... save a few bucks and get the 7894... IF MP3's are a concern of yours... if not, get the 7893... the 93 and 94 both have a "switch" for the internal amp... making the 7995 pointless.
If you have the $$, get the 7897... that deck is SWEET! The large face really makes a huge difference.