as far as transffering goes, not sure there is a way that wont make you want to stab somebody... but it would be fastest to just install all the games again. For music, if you have a large flashdrive, depending on hoe much music you got that isnt on a CD already, that would work.
Newegg.com - Seagate Barracuda 7200.11 ST3500320AS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive - OEM
its a great HD. Very reliable, fairly large, will definately hold all of your space needs for a while. its also FAST. The raptors are fairly old and the 7200.11 is fairly new. I think you will be VERY happy with this HD.
in my opinion the raptors are overpriced and overhyped.
EDIT: peter beat me
... anyways, get that HD, its great.