I had a slightly similar situation. I bought a 32 G SSD with the original intent of using it for audio with my laptop. I never did actually use it for that, so I thought, "Why not put it in my tower computer?"
I agree with Jim Roseberry - Disc streaming sample libraries is probably the best application for the drive.
For me though, my libraries take up more space than that, so i use it now for my audio drive.
I put my sample libraries on another drive and also archive my audio projects to that drive. When my SSD starts to get 2/3rds full, i'll just migrate them to the other drive, so I'll use the SSD for audio recording/projects that I'm currently working on.
I also agree with MoodyB above....64 G is a bare minimum...I would be personally be nervous with that little wiggle room and suggest that you go more than that - say 90 or 120.
I migrated my system to an Intel SSD - 240G - and paid $180 for it.
I didn't see any performance improvement at all until I changed my drives from IDE to AHCI mode in the BIOS. the difference was amazing. Windows has a Fix-it that makes all the registry changes for you! It couldn't be simpler:
http://support.microsoft.com/kb/922976 If your computer was hanging up before boot, then I wonder if your BIOS needed to be twiddled with some more....just a thought. I wouldn't give up on the idea of an SSD system drive just yet.