@Jocelyn84I suspect the choice is more cost based leaving these 2 options...
@OP
I wouldn't recommend as little as 60/64GB for OS and games unless you are really really sure you're not gonna run out of space - once Windows Vista or 7 (and small software like Office, AV, etc.) is on there you might as well write off 20GB leaving just 40GB for games, and depending on what you play you may find that it becomes a very tight fit very quickly, for example World of Warcraft would happily eat through more than half of that and most other big/mainstream games will push from 5-10GB each these days.
E.g: Batman Arkham Asylum - nearly 9GB
Assassin's Creed - nearly 7GB
GTA 4 - nearly 16GB
Guild Wars 2 - requirements state 25GB, but not quite that much used.... yet.
Left 4 Dead - nearly 5GB
Half Life 2 - nearly 5GB
The 'Vertex' 3 series from OCZ is a bit quicker than the Agility using the same controller hardware, but to be honest, you'd have to be benchmarking to really appreciate the added speed - if it was only fractionally more expensive it would be worth it otherwise don't worry.
I guess the Corsair is the 'better' choice in terms of company reputation (and sometimes it is worth it). But they are more or less the same. In terms of the BSOD problem, there has been many many firmware updates from several vendors which 'solve' the problem - some forums are littered with users who report it now fixed and others who still have the issue. Unfortunately it's a bit of a case of 'suck it and see'.