Getting to School: Baby Bjorn

Best All Around Sling

I'm looking for advice on the best sling for a newborn on up. I used the standard Baby Bjorn with my daughter, which she loved. However, my back didn't love it. I thought about the new Baby Bjorn Air Carrier, however, I would also like to have something that cradles the newborn (sling) but can be converted to a sitting up carrier later. So far the one I see that offers a sling type deal (and can easily breastfeed discreetly) that converts to a carrier like the Bjorn is the Ergo Baby Carrier. Has anyone tried it? Any other recommendations? I...