Well, first up you need to define what you mean by 32" monitors. There's a big difference (potentially) between a 30" LED monitor and a 32" TV. I don't know of ANY 32" computer monitors and the 32" TV monitors come in a variety of resolutions.
You just need any Eyefinity capable card. 6670 for instance:http://www.newegg.com/Product/Product.aspx?Item=N82E16814121442
You would need three of those to do the trick, and a motherboard that will hold all 3.