Well said Diki.

It's funny, but what you suggested (using SMFs created from your own modified arranger styles) I actually use for songwriting - I mean, that's WHY I use arrangers (as opposed to Synths/Workstations).

Live, I use SMFs (from so many different sources - free "off the net" (but ALWAYS modified/tweaked/stripped by myself), Pro files, and Custom made sequences occasionally written by myself, because whilst I agree with the "SMFs are mainly for singers statement" - we're Singers first, instrumentalists second - we are also very much a "Dance Act" and all the dancers we play to almost invariably practice with the original recordings, so SMFs/MP3s of those original recordings from the specific artists required, help beginner dancers, intermediate, (and even advanced) do their (sometimes complex and meticulous) routines perfectly.

Just another way to look at the reasoning behind using SMFs.