Joe a lot of the BK5 sounds are better than the G70..like the sounds taking from the SRX boards, and the BK5 has newer drum kits..I haven't played the BK9 yet, but I know others have said it sounds better than the G70.. I like the pianos on all the Roland arrangers..and also the EP's..Other sounds I didn't mention that are far superior to other brands,,choirs and scats are the best on Roland G70, and BK's.