Dual external monitors?
It's possible. You can run one monitor off the HDMI port and another 2 off of the  Thunderbolt ports. You can get adapters for both of these. 

There's more out there than this but here's one Apple sells. 

http://www.apple.com/shop/product/MB570LL/B/mini-displayport-to-dvi-adapter

BTW: Thunderbolt ports can work Mini Display port adapters.