I finally got a chance to play a Roland Discover5 today,,and guess what? It ain't bad..It has the sounds that I like[including Scat]..You can modify sequences on the fly. Mic and harmonizer are good with good effects..On the lyric read out, the display shows the actual chords automatically.. in a way that gives you time to know the next chord in progression..This feature alone is enough to want the board....The keys are "superb" like the G600, as the Roland add stated for the G600;[in reality they are just average]..Overall I like it a lot,,and will being getting one soon[I hope]..