I can't add any substance to the advice that linderman gave you because he has given you excellent points to consider. I do want to talk about and support the raid/vs/non-raid setup he has talked about.
For both my personal computer and my personal spare computer, I use two Sata drives plus an extra IDE drive in each for special usages. The IDE is more for general storage than actual usage and I back those up with making copies of DVD disks or on other removeable storage devices. Let's face it, if you are even a tech, you
ARE going to have data loss unless you have adequate backup strategies.
I use both Sata drives in a non-Raid setup with one being my speed demon for regular usage and the other one simply a clone of the main drive in order to be safe aways and never to lose data.
From my personal experience, you actually won't see any great read or write time differences in most cases with a raid or single drive configuration Don't misunderstand, there are slight gains with raid, but just not large enough to justify doing a Raid 0 configuration with the possible loss of data. The differences are minimal.
IMHO, this analagy (raid vs. non-raid) is kind of like saying my car with a non-raid configuration gets 25 miles per gallon and with a raid configuration gets 25.1 miles per gallon. With a gas mileage comparison like that, you hardly know the difference at the pump.
I wanted to tell you also that you are one lucky person to have two raptors to play with......Envy!