I think SC2 is a cracking game, but unfortunately, after having played the beta, I found that my 24" iMac with 2.8Ghz Core2duo and 4Gb of RAM isn't up to the task. Not at the native resolution of 1920x1200, anyway.
And playing at a lower resolution makes it look a bit fuzzy. So I'm still playing WC3 and I might get that WoW subscription after all since both these games run as smooth as butter.
Pity, in bootcamp Vista, SC2 seems to run a lot smoother, but as I hate rebooting every time to play a game, and since I'll be deleting my bootcamp partition anyway, I won't bother.
I wonder : does the top of the line 27" iMac have the necessary power to run SC2 with FULL detail in OS X at its native resolution of 2560 x 1440 ? That's a 27" 2.8Ghz Quad Core with 8Gb of RAM, 512 Mb ATI Radeon 4850 ?
I wonder... if not, that's a lot of money for an underpowered machine.
I have no doubts about the processor, memory or any of that. The video card is mostly the Mac's achille's heel when it comes to gaming.
I was looking forward to SC2, but it's quite expensive, seeing it's only part 1. There are to more parts coming and since those won't be like normal expansion packs (ie cheaper than the main game), SC2 will be one very expensive game in the long run.
Oh well, I recently bought Civ4 complete (that's Civ4, Warlords, Beyond the Sword and Colonization) on Steam. Paid 10 euros (that's about 12 dollars) as part of a summer sale. Now that's what I call a good deal (sorry, too late now, normal price is back up). It'll keep me busy until I can afford a faster machine...