I would like to upgrade my IGP (GEForce4 MX) on my Soltek SL-75MRN-L motherboard. I have an Athlon 2500+ non-overclocked CPU. I typically play games like Simcity 4, Medal of Honor, Civilization, golf games, etc. and would like a fairly cheap ($50-75) upgrade. (1) For this money, am I going to see a very noticeable difference? (2) What cards would you recommend? Thanks in advance for your help!