Mother with newborn baby in BABYBJÖRN Baby Carrier Original This is a great choice for an infant carrier. And, you can usually find multiple ones at a consignment store in really good shape. We used this for our daughter and it worked great!
Ergobaby - the heavy-duty carrier every mama swears by. Gutted I bought a Baby Bjorn with Nate (he wasn't into it but liked the sling). Everyone I know that's bought one of these says it's been a lifesaver.