Alright, so I looked through a handful of threads on other forums, and I picked out 4 different pieces of software to test out on my system as it currently is. I'm looking for software that'll provide high numbers in the sequential (SEQ) and 4K areas because that's what WoW, and I would assume most other games, use the most.

ImDisk and QSoft are free, while Primo Ramdisk (Romex Software) and Dataram RAMDisk are not. I think Primo Ramdisk (Direct IO) is the way to go because it gives the best performance when you average everything out. QSoft provides the best 4K reads but, I think that giving up about 200MB/sec on 4K reads for a gain of about 1,200MB/sec in sequential reads is a fair trade off seeing as WoW does a lot of sequential reading from its MPQ files during gameplay. I couldn't really care less about writes because WoW doesn't write much to the drive while you're playing unless you do a /reload.