Ok, we have several, DH would say too many, carriers:
Hemp fleece adj pouch: 1st sling, great for the first few months in the cool weather, I'll use it again next fall/winter.
Hotsling stretch cotton pouch: current fave for quick errands, very versatile and easy to use.
Moby Wrap: Best carrier for long trips and walks, or housework. DH's fave, other than his Bjorn (I don't count the Bjorn because I've never used it)
Ergo: Just go this, practicing getting DS in by myself. Doesn't do my baby flab any favors, and you get this bionic boob thing, but extremely comfortable for long carrying, and active stuff. We gave the big dog a bath with DS in this yesterday.
I still want an ABC, and an unpadded ring sling, with pouch. Then my collection will be complete for any baby-wearing situation!