I picked up one of the cheaper SSD's the Kingston SSDNow V-Series 64GB. Here's a review I posted on it. Granted this model is cheaper than other brands therefore its also slower. However in working with smaller file sizes there is a slight difference in load times.
Installed in a Unibody MacBook - replaced stock SATA 160GB 5400rpm - Did a speed test using the AJA Speed Test tool from AJA dot com.
First Test - Read Write 128MB File
160GB - Write 60.5 MB/s Read 59.1 MB/s
64SSD - Write 67.8 MB/s Read 85.4 MB/s
Hands down; on smaller files the SSD wins. Now for bigger files such as video clips.
Second Test - Read Write 1GB File
160GB - Write 59.3 MB/s Read 58.3 MB/s
64SSD - Write 42.0 MB/s Read 77.4 MB/s
The graph for the SSD write looked like it could potential have a stuttering problem since it was not a consistant tranfer. Spikes and dips in performance.
So the SSD had trouble writing over a longer period of time, however the read was still noticeable quicker.