8GB of RAM is enough for most applications, so unless it is running in single channel mode I wouldn't bother with the RAM upgrade. I agree with zooted that you should get a better single GPU rather than SLI, you will see a greater performance increase. Next, is the SSD. You have to decide whether gaming performance is more important or general system snappiness is more important. An SSD isn't going to do much for gaming other than reduce the load times, where a graphics card will have much more impact on games. The SSD will only help windows boot faster and applications to load faster. As far as that goes, decide which is more important and you will have your answer.