I would get both!! I did!

I got a HAB when my daughter was a newborn - it was complicated at first but I got used to it. However by the time she was about 4 months old she was just getting too heavy for it. So I got an Ergo and sold my HAB on ebay for th esame price I brought it for off Ebay! (it was 2nd hand).

I now have an Ergo and I LOVE IT!!! Its so easy to use, my baby loves it (well doesn't mind too much!) and its very comfortable to use.