I have a few extra cards laying around and was wondering which would be better for a home desktop with a 4 monitor setup. I know there older cards but really don't feel like going out and buying a new card. Reviews I saw online say the Radeon 4550 is slightly better but in saw that the Nvidia Quadro FX570 has a 128bit bus and the 4550 has 64bit. But the memory speed was 2x higher in 4550. Just want to make sure I use the better ones or will it not really matter? I'm only using a trading platform with mainly charts displayed and browing the web on the PC.