Although I'm not the biggest fan of them as they are a one shoulder thing, Ring Slings are very adjustable and should be fine for both you and your DH.

If I was you, I think I would get the BB (you're gonna get it really cheap, right?) for when your DH is wearing bub and then buy some fabric and amke a HAB. You won't even need your sewing machine.

I wouldn't get an Ergo until Bub is a little older and you really know whether you will need it or not. Some people start out with great intentions to wear their baby a lot and then don't end up doing it much. If you do decide you want to give the Ergo a go, I would go to a Babies Galore or wherever they sell them and ask to try one with your baby. That way you cna see how well it fits you and DH.

My Dh didn't really like the HAB for himself because it was to "Hippy" for him and just too Mother Earth-ly. I do have the red one with the Aboriginal Print on it, though. But I love it. He did wear it a few times, but I tied him up ;-) He thought it was very comfortable but I don't think he would wear it out and about.

Saša