By Far ... the SD1 has the BEST SMF playback I have heard. Especialy songs containing Guitar strumming (ex. James Taylor etc.) Awhile back I was at a Sam Ash and played a Tune 1000 James Taylor SMF in a 9000Pro and a Triton. The 9000Pro was Very Poor the Triton much better, but not as "Life Like" as the SD1. I am hoping the PA1XPro is an improvement. The Roland (I owned a G600 & G1000),in my oppinion, does a better job than the Korg and the Yamaha.