I think I would start with the Asus P8Z77-V Pro and if my budget was giving me a problem I would look at dropping down to the ASRock Z77 Extreme4.
Asus P8Z77-V Pro http://www.newegg.com/Product/Product.aspx?Item=N82E16813131819
ASRock Z77 Extreme4 http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
With the Asus P8Z77-V Pro it has 4 different video outs on it, will i be able to use 4 different monitors? And if i add a videocard that has lets say 2 DVI ports and 2 HDMI ports, will i be able to use 2 or 4 of those outputs, and will i still be able to use any of the mobo vid outs at the same time. I'm looking to have 4-6 monitors.