Myself I will stay away as long as it sounds like you're playing a studiomixed CD on the stereo as soon as you hit a chord.
I know the above has been said by many others, many times before, but it certainly sums up my feelings, as well. In fact, that's more of a turnoff for me than the lack of 76 keys. Just personal preference, though.
"Faith means not wanting to know what is true." [Nietzsche]