Currently have the GeForce 4, however, this is not compatible with Aero graphics with the new win 7 system. I have a 17" LED monitor I would like to use. Currently using a CRT. After viewing what I have what is the hot Graphics situation that will operate with my system. Keeping in mind the pocket book is frugal but sometimes a little more spent is cost effective in the long run. Not much of a gamer but love flight sims and such. Are there any other upgrades that should be considered?