I'm about your height and I did like my Hotsling -similar to peanut shell. I'm between size 1-2, but I'm more at 110 lbs, you'd want a 1, but could probably use a 2 for a while after having baby. I was able to use a 3 for 2 months. I used a ring sling a little bit, but I found that because I was small it seemed the ring was always in the way! It was better to nurse in.
I also loved my MT, but when DS was itty bitty a sling was better for nursing or quick trips, IMO. I have a wrap to try this time, but I've heard that the Moby is long and I wouldn't like having all that extra legnth, so a friend gave me one she made out of jersey fabric. I can always cut it shorter if it's just too long.