There was a large SSD-Test in a german magazine last week and they conclude that current SSDs will not result in a performance boost, but most likely slow down your system. However there is one exception: the new SSDs from Intel. They are pricy, but very fast. Intel developed a new controller from scratch and apparently they did a good job. The test showed that a system with the OS on one of these babys was 15% faster than the system with a conventional HD.