If you're going to do most of your composing on the computer the GW-8 would probaby be a good fit for you.., as all you'll need is the instr. def files (and I think I saw on a site Roland already has a set for a popular seq app).

Sound wise you should be happy with the GW-8. It's sound engine is based on the Roland Fantom X and SonicCell. You can tweek the patches, but not to the level you'd find on a larger workstation, but the basics are there.

If you're looking for a basic scratch pad seq.., then that's exactly what the GW-8's is. It's very limited in post song editing, but it will let you lay down 16 trks.

For what you want to use it for.., I think it's a great bargain for you. You already stated you compose mostly on the computer.., so the GW's limits on the seq would be overcome by your software seq. However.., your patch-editing needs may or may not be met with the GW. You should download the manual and have a look at it.