The problem Ruler2 is that we can only speak generalities given that you are never specific about what you have, or intend to use.
Generally, striping (RAID 1) is higher performing. Take 4 drives, put them in a RAID 1 array, and you theorietically get 4 times the throughput. Except that in a Windows environment generally you don't, because of inefficiencies in the hardware/software used. Early benchmarks for a 2 drive RAID 1 array in Windows saw little to no improvement over a single drive.
Generally, RAID 0 is "safest". Except that sometimes, it's no better than a single drive because almost anything you do will be likely to do will be fakeraid - Not really RAID at all because the OS drivers do all the work. And often times when one drive fails the other one get's dirtied up by the failure such that your supposedly good mirror is junk too. And since you often can't move the drives to another device -sometimes even an IDENTICAL device - and read the raid array, you often end up with an increased risk of data loss over a single drive configured to a "standard" SATA controller because of all the things that can go wrong with Windows fakeraid itself, on top of what can go wrong with the drives mechanically.
Generally, I'd consider RAID 5 a poor choice at best because it's going to be poorly implemented at best on the class of RAID controller someone who has decided to do RAID without knowing anything about it is going to use. It was a compromise to begin with - better performance than mirroring at less cost than mirroring while still maintaining redundancy.
And for gaming, RAID doesn't really add much - most games don't do a lot of disk IO except upon load, and so you don't see a lot of overall performance increase.
In fact, if what you want is high performance and redundancy on the cheap, get 2 drives and periodically use a tool like Ghost or Clonezilla to duplicate your work drive to the backup - and if the primary drive fails you can switch to the mirrored drive and be back in operation at the point you last mirrored them.
And for every generality I've given you, someone can come along and give you a specific instance where it's completely wrong.
