I have seen the VGA output on GeForce2 cards and Radeon 8500 cards and my vote goes to the Radeon 8500. I haven't seen the G450 though to be able to make a statement about it.
If price isn't a problem then get he AIW 8500DV,this would give the capture capabilities you were looking for in your other post If your looking at getting individual cards get the G450 and a Hauppage Win-TV Theatre