I'm getting a 2.13GHz MacBook Air with 4GB and the 256GB SSD. I plan to run Windows 7 in Boot Camp (because I occasionally need Windows XP Mode) and also in Parallels 6.0 (which I plan to allocate 2GB to). When I use Parallels it's mainly to access Quicken for Windows. I'm debating whether to reinstall Win7 32-bit (which I have on my current 1.86GHz MacBook Air) or to step up to 64-bit. If it were just Boot Camp, I'd go with 64-bit for sure to get all 4GB available, but I'm not sure how well it would run in 2GB (Win7 32 bit can be awfully slow in Parallels with just 1GB on my current setup). Any suggestions (perhaps from those with other Macs that already support 4GB of RAM)? Would 64-bit with 2GB in Parallels be OK for occasional use in order to get the full benefits of 64-bit in Boot Camp, or am I better off sticking with 32-bit?