You have the most common problem of an average ssd user. Too small and cost too much.
If I had a single HD with average performance, I would notice a big improvement with the SSD. But coming from RAID-0 with WD Caviar Black drives, the performance bump was not huge and not worth the expense. Maybe my expectations were unrealistic, but I was also a bit spoiled coming from RAID-0. Now I also have a future pain to migrate the system. For instance, what if my next desktop Mac is an iMac with Sandy Bridge. Uncertain whether I'd create two partitions for that configuration. It can be done, but it will be more complicated than simply cloning a single partition.