Advice on new Drives MP 3,1

[cpnotebook80]

My mac pro 3,1 has this 320gb hard drive installed
http://www.wdc.com/en/products/products.asp?driveid=305

I guess its good enough. But wanted to add another drive so I can put my music and iphoto and videos on it seperately.
I also want fast access speed to that drive.
Also, maybe my applications can be transfered to a faster disk for quicker load times. The current hddrive is 7200 rpm.Dont mind getting 2 drives then.
Questions is what drives are out there for mac that will be good.

Any advice please and thank you

[rickvanr]

Any SATA drive will work. There is no such thing as a mac specific drive.

SSD are the fastest, but most expensive $/GB.

I saw benchmarks that one SSD is still faster then two HDs in RAID0

Maybe grab a SSD for your OS and apps, and then something like a WD 1TB black for everything else