Bill:

For the PC, in my view, Cakewalk is probably the most popular, and offers the best user support.

The Sonar products are focused on audio and very expensive, but Home Sudio or, better yet, Cakewalk ProAudio 8 or 9, are excellent midi sequencers. I see them on eBay for $40-50. You might even find a user on the Net who has migrated to Sonar willing to part with his old ProAudio for a lot less.

Regards,

Michael