I saved quite a few carriers from when dd was a baby. I have tired just about everything out there and for me i just could not get wrapping down. My favs are my beco 4g, my Angel Pack is by far my fav structured carrier that is sold and easily obtained, no stalking or waiting. I also loved my Baby hawk! Only real issue is that it you are looking for a good carrier for your LO to sleep in you are going to want something with a sleep hood, or something, which baby hawks dint have sadly. They are good for front carries when your lo is young, and back carries for short outings, but no head support for sleeping. I also love my wrap conversion MT, its so very comfy and has a sleep hood, its just A LOT of fabric and my DH does NOT like it at all. Other Fav MT was my old Bamberoo, GREAT for older babies and toddlers!!!
I'm hoping to get a Ocah Full Buckle Wrap conversion as my go to carrier, and if not I will probably invest in an Ergo.
Oh, and i used my ringsling almost daily with my daughter when she was an infant, they do have a learning curve, but great for easy quick carries, and snuggle factor, AND so very easy and discrete to breastfeed in!