I'm thinking of buying a Lenovo X230 laptop. The SSDs they offer, however, max out at 128GB which is way too small for me. Since the X230 comes with an ExpressCard slot, however, I was thinking of ordering it with a 500GB HDD for my data and adding an ExpressCard SSD for my apps and OS (Win7 x64). Any thoughts on this approach? Pros, cons, recommended SSDs? Thanks.