As everyone has stated....can't go wrong with the MM cobs. And for 40 bucks you have a 4 pipe rotation on your hands.

If you are patient and brave, there is the estate game on ebay. I regularly pick up some amazing pipes in the 25-50 dollar range. They require some work to get cleaned up, but at the end of the day you have a great pipe, usually worth more than you originally paid for it, and a great, aged smoker on your hands.