[quiet mike]

Don't expect too much improvement on tests. Unless you magage to get the same type of RAM and have a dual memory channel board, you will se improvements just barely, but the system will be much more stable.

As to the the more expensive RAm, if you buy OCZ, Kingmax, Crucial or other elite types of RAM you can push those sticks at much higher speeds with a very low latency, resulting in much faster gaming and faster computer in general.