I am still on C6 here, but my experience with W7 x64 + C6 x64 has been a great one. I’ve used Macs for many years, and made a switch a couple of years ago. I don’t know how all those guys run into troubles, but my machine has been performing very well. Maybe had 2 Cubase crashes in a year (I use pretty big VSTi based template for my projects). I consider that as very reliable.