OCZ SATAIII SF22xx SSDs = Plug and PRAY. The pray is due to a "Small Percentage" (OCZs words NOT mine) of Systems that just do NOT work well with the Sandforce 22xx controller. Need to ad to the box "Buyer beware" (if you are in the minority, such as Me), you are stuck untill it is fixed.
Marvel based SATA III SSD are less probmatic (most problems seems to affect Mac users. Not as fast, based on Benchmarks, but not much difference in real life.
There is something you should know about solid state drives and pc games. It is true that a game will load faster. In addition, maps, weapons charts, and other similar pages or pop-up windows will also load faster. That's about it. There are some things an ssd will not improve. An ssd will not improve FPS and it will not improve the actual game play.
That being the case just about any SATA 3.0 6Gb/s ssd will do for loading games. However, as Retired Chief mentioned, there have been problems and issues with ssd's. The list of problems keeps getting longer. Some problems are major issues and some are relatively minor affecting only a small percentage of users.