I changed over to a Corsair Nova 60gb ssd on my daw and couldn't be happier. It's much, much quicker than a spinner, espeically when opening and using apps like SoundForge. All tracks are still kept on conventional HD's, but processing those tracks in my mixing app(N Tracks) is vastly improved.
I use windows 7-32bit, on an i5 650, with 4gb of ram.
You can keep those two drives and reclaim space by moving the OS to an ssd.