I've started running in New Balance WT101s while trying to transition to minimal running (I tried using huaraches this summer and ended up with a blunt-force crush injury to my forefoot from doing too much too soon), and they promote the proper footstrike, while still having some protection. Plus, they don't have the little grooves that pick up crud, like the Nike Frees. The most common complaint about the Free is that gravel and crud gets stuck in those grooves. I think the men's version is called the MT101.
Plus, they're only like $75 and they sell them on Endless.com. I used credit card points to pick up an Amazon gift card, so I only paid $25 for mine.