So...with the AVR300 now on order I'm temporarily stuck with a cheapo two-channel amp. Fortunately I do still at least have the 27A, and wow! Two-channel moviewatching is pretty great, and regular old redbook is just amazing. I do have a few remaining questions: 1 - Is there a way to determine the current software/firmware version on the 27A? 2 - The box it came in is stamped 4.0. If that's accurate, is there a later version I ought to consider? If so, what changed in the later version? This forum's a great resource -- I really appreciate it & hope to be able to contribute something more meaningful one day rather than just asking questions!