"for giging SD1 really sounds like a bar band to me, while Tyros sounds almost too perfect like CD..."

That's it! The SD1 sounds live. The Tyros sounds like a CD. Nothing wrong with either one, just a preference. Maybe I'll get tired of the SD1. Maybe by then, there will be an SD2. Maybe I'll finally get my hands on something else--GEM, Korg--who knows. For now I'm still loving the SD1. I still have much to learn about it.
DonM