RAID and Gaming

[Natalia]

What is the Best configuration for RAID if you are solely using the computer for gaming? (Alright I admit I shop for clothes online and write a paper for school here and there )

Currently I have a RAID 0 configuration my friend helped me with. We set up 2
Seagate Barracuda 7200.7 ST380817AS 80GB Serial ATA 7200RPM Hard Drive w/8MB Buffer
in RAID 0.

I was wondering... would I notice gaming improvement more with which of the following:

1-No Change
2-2 10,000 SATA Drives in RAID 0
3-3 of the same Drives above in RAID 0
4-Some other RAID configuration, i.e. 1,3,5
5-2 Seagate 15,000 RPM Cheeta's in RAID 0
6-Other

Sorry I don't know too much about this, and most of the sites I have gone to can be a little too confusing to me