need help with future raid setup

[kopykat]

Hi guys,
Im planning on getting a couple of 74gb raptors. Im a graphic designer that spends alot of time on photoshop most of the time = opening and saving large files frequently.
I have an Asus P4P800 motherboard and Im not sure the onboard raid controller is good enough for running 2 raptors @ level-0 raid. From looking at the mobo specs it supports up to sata-133 and i know the raptors are sata-150.
can someone plz tell me if the onboard raid i have is good enough, and if not recommend a raid controller I should get for a fair price. thank you.

Asus P4800 Deluxe - 3.0C - 4X256MB corsair twinx - 6800GT 256mb - sata w/8mb 160gb - 120gb w/8mb - Thermaltake purepower 480w - Thermaltake XaserIII

 

[kopykat]

so...
what do you suggest?
stay with what I already have or get something else?
and if i do get something else... what should it be?
thanks for the quick response.

Asus P4800 Deluxe - 3.0C - 4X256MB corsair twinx - 6800GT 256mb - sata w/8mb 160gb - 120gb w/8mb - Thermaltake purepower 480w - Thermaltake XaserIII

 

[kopykat]

just out of curiousty,
how much of a performance difference would their be between the two options if at all?

Asus P4800 Deluxe - 3.0C - 4X256MB corsair twinx - 6800GT 256mb - sata w/8mb 160gb - 120gb w/8mb - Thermaltake purepower 480w - Thermaltake XaserIII