wow thanks for the replies~ now i know my desktop will run fine....
you guys recommended me getting another 2GB RAM stick? so 3 RAM sticks total? depending on how much each one costs I'll buy an extra. But I think I am gonna try the 2GB RAMs first before buying another one...

also, VISTA gets a free upgrade to Windows 7? Isn't there a downloadable beta out for Win 7 atm?

the monitor I am getting is a HD 21" monitor (as you can see on description)~ not sure what the resolution is on that item, but I guess I might need to lower it...