The MAP is a 10,000 RPM and the MAS is a 15,000 RPM.
You can use IDE if you have it. I would go with IDE. Make sure you get a drive with at least 7,200rpm and a 8mb cache.
If you do alot of video editing or use your computer as a file server go with SCSI.
INTEL i7 930
3x2gb Corsair Dominators
EVGA GTX 480