I posted on the Roland forum about the SRX-07 "Ultimate Keys" board which I recently installed in my E-80, and which has some of the best Hammond patches I have ever heard - and being a Hammond player, I am generally pretty unconvinced by the wannabes. It also has a few terrific sounds I was not expecting from a board that majors on vintage key sounds, including a breathy tenor sax even better than the (already superb) one on the E-80, and the best and most playable Spanish guitar I have heard to date.

Fran is right when she says Roland have always been good at this - I remember some excellent expansion boards for my U-220; sounds which are still very useable today.