I'm a pretty big fan of the swiss model, I think it contains the best of both worlds:
You're forced to buy a certified policy with a certain (broad) coverage. If the cost of such a policy exceeds 8% of your annual income, government makes up the rest.
Both insurers and providers are regulated heavily for quality control, but compete freely for their business.
The result is a generally consumer driver system, as opposed to an insurer driven (US) or state-bureaucracy driven (most of Europe) model.