There have been reports of significant performance degradation over time with SSD drives, especially when there is heavy write activity. The theory is that this is due to internal fragmentation of the files on the drive by the wear leveling algorithms in the drive firmware. This may be worth testing for yourself before making a full commitment to SSD in your enterprise. This article details the authors findings using a laptop SSD drive http://www.pcper.com/article.php?aid=669&type=expert&pid=1