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.
The SanDisk Extreme Pro series drives finished about in the middle of the pack according to PCMark 7's secondary storage benchmark, but things were pretty tight. Save for the Samsung 850 Pro with finished about 150 points ahead, the rest of the drives performed right about on par with one another.