I am on an iMac i7 quad 2,93, 1 GB Vram and 12 GB Ram, the top model of 2010, and it is painful!!! No AI planes, no HDR, no water effects and no clouds will get me up over 20 sitting at KSEA in the default 747 and over 40 in surrounding areas. Dans ERJ sucks up more frames than the 747 and I don't even want to try fooling with the CRJ200, it would porbably crawl at slideshow pace with that AC loaded. Not too exciting an outlook for the future, eh? I put ordering X-Plane 10 on a personal hold for now, even though I was so excited about it. From what Austin said at this meeting in Belgium, I expected X-Plane 10 to run about the same speed/ frames on my multicore Maschine than version 9 did. I wouldn't rant if it was a bit lower on performance, but like this, there is with similar settings a Grand Canyon between the performance of 10 and 9 on my computer. And I would also suggest that Laminar takes out all the crappy aircrafts out of the aircraft folder for version 10, because they are frightening to every switcher or x-plane greenhorn. Sometimes less is more and that certainly goes for the acs! There are enough well done payware and freeware aircrafts out there.