Mods for GWX Gold

[simba of the deep]

Hi all
i am new to the forum and have been just reading all the posts and have decided to get involved
with the forum and try and contribute something back in ideas of hopefully some mods that i would like to do,i hace picked up a different rig for SH3 which i a 2.66ghz with 2 gig of ram and
a nvidia geforce 6200 vid card so if possible could some of you guys give me advice on the following points.
SH3 i have installed GWX GOLD,what other mods should i install ( i really like some eye candy)
but really want it to look and feel right and not put to much pressure on the computer?
I want to install SHCommander on two installs but not have them interact in any way with each other?
SH4 Can my rig run it and also the mods ?
simba