I had a PSR6300. At the time it was the top of the line. It had really good FM brass sounds and electric pianos. The strings were o.k. I midied it to an external drum machine, and used a DX7 for lead sounds.
I later added a piano module (FBO1?) The time frame is fuzzy now. Anyway it was I think the second or third PSR I used after getting away from full-sized organs.
DonM