I'm about to buy a new 13" MBA from the Apple Store (brick and mortar) soon but I have 2 quick questions: I understand Mountain Lion comes out this summer and that even if I buy the Air now, I'll get the voucher for a free upgrade. HOWEVER, is there any advantage (performance wise) to wait until the Airs actually ship with Mtn Lion already installed? I've done upgrades in the past (ex/ Tiger to Leopard) and it always feels like my computer is slower after the upgrade or things have shifted around. I'd hate to feel the same way after it's only a few weeks new. Next, does the Apple Store sell a MBA 13" i7 8GB with only 128gb storage? That's really the model I want as I have no need for 256gb of space. I see a lot of members here say "i7/8GB" but I have no idea if that refers to 128 or 256gb. Online there's no option to downgrade the SSD from the $1499 model but oppositely there's no option to upgrade the processor to i7 from the $1199 model. Thanks!