I use the low-end Mens Specialized Mountain shoes and the mid-range mens Specialized Road Shoes and I love them both. I got the mountain shoes for my commutes since I have to stop more and be able to walk in them. I'm thinking next summer I may go up in price on the road shoe and I would consider looking at the Sidis in addition the Nikes and Specialized.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"