I just bought an OCZ Vertex 30GB. Sure, 60 GB would've been nice but these SSDs are so expensive. I didn't bother with anything slower than the Vertex - either you shed some green for a fast drive or you don't.
Also, a reminder, SSDs are still only really worth it when random access is the bottleneck. Sure, 200-250 MBps is nice, but it's "only" 2-3 times faster than physical drives and IMO not worth the price.