I had a moby wrap when my son was little, and we both loved it. This time of year it would be great. My son was a January baby, however, so unfortunately by the time he was 6 moths old it was just WAY to hot to be all wrapped up like that.
Around that point we transitioned to a side-hip carrier, which was fine, and he liked it, but I missed the snugly feel of the wrap.
There are inexpensive brands sold at Target or Walmart that can do the job well, just look for features and construction you want.
Whatever you get, remember that in terms of hip development, you want baby either cross-legged or straddling you, so if you get one where baby hangs by the crotch, make sure it's a nice wide construction that helps her legs go OUT rather than straight down (like an ERGO instead of a Bjorn). That with put the pressure on her thighs rather than her pelvis as well as encourage proper hip placement.
Good luck on your search.
T.