Multiple Monitor Graphics Cards

[cryptmagic]

I need some suggestion, i have a very powerful computer. I currently have one monitor. My computer has 3 pcix16 slots. I need a recommendation on video cards. I would like to run 4-6 monitors. Does anyone have any suggestions? I've seen the Quadro NV450, but afraid of its performance issues compared to other regular graphics cards. I do play games, so i want one that's powerful. I mainly trade, but I wouldn't mind playing a game on one monitor while trading if its boring.