Small Room. Go for it or forget about it?

Well I am up against a wall.... Literally... I have been forced into a 12' x 12' room. Will be a monitor/tube setup. The more I read about small rooms, the more discouraged I am to even bother setting up a system. Please help restore faith!! I have been looking into Manley gear/ Proac/ Sonus Faber

Any insight would be fantastic