My appian crapped out and am currently in the market for a vid card capable of handling 4 monitors. This is only used for trading and will not having any gaming application. Ideas for card under 400 that you've had experience with?
It really depends on what inputs your monitor has. If they're all DVI, the cheapest option is probably a Sapphire 6770 Flex with an additional active DisplayPort>DVI adaptor. Both items should come in at under $300 total. If at least one of the monitors are DisplayPort capable, you can skip the active DisplayPort>DVI adaptor and the card by itself comes in at under $200.
If you're going this way, make sure you get an active DisplayPort>DVI adaptor. The passive ones are cheaper, but will not function correctly.
Four monitors at what resolution? Also, DVI? Display Port? HDMI?