An a1200 + fast ram +whdload is probably the best compromise in my opinion.
Yep I agree, a 1200 makes the best (and most compatible) Amiga gaming platform. If you're having audio issues you might want to get that motherboards CAPS replaced + check for timing faults.
BTW file transfer will still be slow with the Subway, easiest solution is a CF PCMCIA card. I'm currently transfering loads of WHLOAD games and demos over to my Miggy from my PC using this method and it's quick and painless.