There has been some discussion of this topic in the BK-9 thread and I posted this there as well but thought it might get lost so I posted a separate line here. I like the BK series because I think Roland has a better "Style" sound especially with drums and bass but I can't give up the SA voices. Why? Here's a couple of demos with examples of Yamaha SA2 Voices, specifically the Breathy Tenor Sax. I have not found a better sax voice or Trumpet voice. The SA and SA2 voices are the only reason I keep the Tyros 3. Those voices are very expressive and as someone who played Tenor Sax for many years it responds exactly the same way as the real thing. The examples are my compositions with Drums, Pads, ARPs and bass from the Motif XF and leads from the Tyros 3.

Dreams of You (SA2 Jazz Trumpet and Tenor Sax)
https://www.box.com/s/gc4p2frx9vt0f4o5ge8l

It's Over Now (SA2 Jazz Trumpet, Classical Guitar and Tenor Sax)
https://www.box.com/s/tbl7myn6mmv05cnk5xfm

Candelight (SA2 Jazz Trumpet and Tenor Sax
https://www.box.com/s/q6a1y2o5lh63up1ghpkd
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joesax
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https://music4stressedoutsouls.bandcamp.com/
Tyros 3, Motif XF6, Quad Amp/Pre-Amp/DAC, Quad Monitors, Tascam Digital Recorder