if you aren't overclocking, the RAM upgrade isn't worth the money
it will give you a 5% performance increase at the best
about the HDD's... it depends on your storage needs
do you need 1TB?
and the raptors are a bit faster but IMO a stupid buy at the moment with the SSD's getting more popular
if I were you i would buy nothing and save the money to buy an eight core, 9800gtx or whatever in the future
If you really need more storage i would buy a Seagate 500gig HDD. they are a bit more expensive but they come with a five year warranty.
If you are out of space or want a nice speed upgrade, get another 250GB drive and run JBOD. Raptors are about the least bang for the buck available. More RAM will provide only marginal improvement for multitasking and large file management like Photoshop. You've got a pretty nice system as is, why throw more money at it?
No apologies necessary. Just wanted to know what you were upgrading for.
I know you're overclocking at least the cpu. If you overclock the ram, you will get a bit of performance boost. You can also overclock the gpu. If I were to upgrade the same pc for gaming, I would invest in a quad core cpu since the pc pretty much ran out of upgrades. Then I'd overclock the q6600 to 3ghz.
Raid-0 might help for video conversion, but if you put the input on one drive, and the output on another drive, I think you would do much better. For a good tutorial on raid and hard drive performance, go to www.storagereview.com.
I doubt that you will notice any difference in boot times with raid-0 vs two single drives.
Seems to me that an E6300 @ 3GHz is OC'd pretty well.
Not much room to improve without serious $ for Quad core.
I second the girlfriend payout plan.
Otherwise, monitor improvement, a G5/G9 mouse, or a 2nd hard drive as mentioned above.