I am about to have number 4 and I'm kind of on borrowed time. I need to buy a new carrier to use for this baby for about 6 months--at which point I will likely switch to my Ergo. My back gets really sore with most carriers, and not helping is the fact that this baby is STUCK breech so I'm 99% likely having a c/s and so lifting will be a challenge for the first little while anyway.
I need something that has relatively good arm freedom--my other three are kindergarten and under and need a lot of my hands-on involvement. I'm worried that the fourth baby will not be getting as much mom time unless I'm wearing him :( Also, relatively easy to put on would be nice. Other than that, I'm mostly concerned about back support. I've been looking at Baby K'Tan and Moby on a friend's recommendation but I was hoping the experts here would also throw in your advice.