Hey,
I run two 24 inch monitors from my MacBook Pro (13-inch, Early 2011)
One monitor is connected via thunderbolt and the other a cable matters USB to HDMI.
http://www.amazon.co.uk/Cable-Matter.../dp/B00BPEV1XK
I find the graphics/video on the 2nd monitor okay but not perfect but its the best your going to get on a macbook
If you need any help give me a shout.