I'm a gear whore...I bought one of these:
http://store.tptherapy.com/ProductDe...ctCode=TPT-TPQ
Makes the foam roller seem like child's play. This thing brought tears to my eyes. It's like using a barbell as a roller.
It's only big enough for the quads (can't roll out your back, etc.) but it hits much, much deeper than a foam roll. Plus, the way it's built...it appears that it will far outlive a regular foam roll.