We really like PCMark 7's Secondary Storage benchmark module for its pseudo real-world application measurement approach to testing. PCMark 7 offers a trace-based measurement of system response times under various scripted workloads of traditional client / desktop system operation. From simple application start-up performance, to data streaming from a drive in a game engine, and video editing with Windows Movie Maker, we feel more comfortable that these tests reasonably illustrate the performance profile of SSDs in an end-user / consumer PC usage model, more so than a purely synthetic transfer test.
Crucial's MX200 drives finished strong by hanging tough with Samsung's 850 Pro in PCMark 7's various tests. Its "overall" score was a little lower, though higher than both the OCZ Vector 180 and Crucial M550.