The SSDs are all priced too high - for the OS (Win 7 64-bit) and a few games, I would prefer a 32 to 40 GB SSD.
The RAID setup sounds like a great idea! In RAID0, (striping), if one disk fails, all of the data on the array will be lost.
I have my data set up on 2 disks in RAID1 (mirroring) - The contents of each disk in the array are identical to that of the other disks in the array.
Go with RAID1 (minimum 2 disks required).