I know, I know, this sounds like a silly question, but maybe not. I'm using Tiger on my fall 2006 2.16 Ghz, 2 gig, 250 GB 20" IMac - just never got around to upgrading to Leopard. I must admit that I've always found this machine to be a little bit slow, even in comparison to the eMac G4 I upgraded from. Anyway, I'm now torn - do I upgrade to Snow Leopard and hope for a significant improvement in speed (application load times, switching application times, fast quit times and less need to force quit, etc), or do I wait and buy a new iMac when they come out? This iMac should have more than enough computing power for my needs (email, browsing, occasional webpage editing, MS Office, etc), but it really has seemed to slow down over the past year. I'd like to think a new OS would turn it into the machine I always hoped it'd be, but maybe I should just invest in a new iMac when they come out. Thanks!