I used a 64GB vertex 2 as my
I used a 64GB vertex 2 as my htpc OS drive for a couple years, but I just replaced it with a 120GB (samsung 840 pro, but that part doesnt really matter).
I found that if you want to use a 64GB you are going to have to spend a little more effort making sure you don’t install too much and are getting rid of temp files. Every so often I’d have to clear off some room because I was down to a couple GBs free.
its not a huge difference, but I don’t think i’ll have to bother with that now that Im at 120GB. looking at slickdeals or the deals forums at various larger messageboards (i use hardforums for this purpose) you can get a solid new 120GB for ~$90 (and there are a couple options out there at the moment). If you can swing the difference, id suggest it.