just a little bit of simple comparison between
1 a seagate 160gb hdd,
2 a verbatim 64gb ssd-go and
3 a gskill phenix pro 128gb ssd,
all sata 2 drives on a sata 2 controller in win7 64 bit in the windows performance score chart
the seagate scored 5.9 (from my experience the hdds all score approx the same ie 5.9)
the verbatim 64gb ssd-go scored 6.1(my idea is that it the lack of latencey for the spinning disc that helps)
the gskill pheonix pro 128gb ssd score 7.6( better controller and faster memory cells).
so my advice is look at the sandforce controller drives, esspecially those with the higher read AND write speeds(higher IOPS numbers)
harpo