ERGO! Or have you thought about the Pikkolo?
First off, have you tried the tummy-to-tummy carry with your Peanut Shell? You should still be able to hold your dd in an upright position in the Peanut Shell, if that is what she prefers.
If that doesn't work, I definitely recommend the ERGO, although your dd may be a little young to use it without the insert. You might also look at the Pikkolo or Beco, since they can be used from birth and on into toddlerhood, and can also be used as back carriers. And Pikkolo can be a hip carrier as well.
Let us know what you decide!
Owner, Carry Me Away
Mama to Jack, 5 and Maddy, 3