I'd like to buy a keyboard, partly for input, partly to learn some keyboard skills, and partly to make interesting sounds with (although that's the lesser requirement). It must have full size keys, velocity and a reasonable touch - but not necessarily a full set of octaves.

I'm considering getting a Korg M1. I know it's a vintage item, but it seems to get a lot of enthusiastic support and they are quite cheap on eBay (around £250 ish).

Any advice?

Rob