This Anandtech post says that the 1.6g cpu from 11" Air doesn't have VT-d technology, which can be found on 1.7g i5 or 1.8g i7. http://www.anandtech.com/show/4554/apples-11inch-macbook-air-core-i7-18ghz-review-update I've googled "VT-d" but those tech terms seem too obscure to me. What's the real benefit in Parallels Desktop? I do a lot of Windows stuff on PD, is the performance gain (if any) from VT-d noticeable? I just bought my $1199 11" air a few days ago. Is it worth the hassle to return and re-order a customized one with the 1.8G core i7 cpu, just for the VT-d?