George,

Glad to see posting about ensemble pianos. I have a PR 702 that I have been thrilled with and have played both the 604 and 804 a very little bit. I have a brochure on them, so can answer questions about the differences between the two models if you have any.

The x04 series is a natural progression from the previous models, retaining all the really nice operating features but with updated rhythms and sounds. I don't think you could go wrong with either one.

I don't have any experience with the Yamaha you mentioned, but have played the CVP 209 and thought it to be a fine instrument as well.

Lanny