I have yet to hear a set of built ins that aren't blown away by a quite inexpensive set of externals. Let's face it, if GOOD external speakers could be made as small and slim and shallow as arrangers' internals are, they would be selling them like hotcakes....

But yes, from an old accordion background myself (learned it slightly before I got into piano), I can see where you are coming from. But, OTOH, haven't you ever thought 'wouldn't it be nice to try and LEARN the piano' in addition to the accordion? Not a problem with the 76...