rMBP 13" question - Multiple monitors

Hi everyone, I am planning to purchase a rMPB 13" for school, but at home I have a 3 monitor setup.

I've heard from some that the 13" model only supports 2 + it's own instead of 3. Is this true?

If yes, is there some way to circumvent this (perhaps not using the screen on the rMBP by leaving it closed)?.

Hope someone can help me out, depending on the answer I might need to rethink my choice (or hope they change this limitation when the new ones come around, cause I might be able to just wait that long).