eeks, anything is going to feel good after the Bjorn with a kid that size! for older/heavier babies you want either a larger-bodied mei tai like a Kozy or Toddlerhawk, or a SSC (soft structured carrier). My preference after a year of age is a SSC (though i do still use my Kozy occasionally).
As tinyblackdot mentioned there are lots of specialized SSC's out there for toddlers. I have an APLX which i quite like. i agree, Frogmama is a great place to buy, and she sometimes has returns and other one-offs for cheap so keep an eye on her clearance section! i got one of the production samples she was selling last year for a lot cheaper than a regular new APLX. i think it was maybe $75? Nana's Jetpak is another taller-bodied SSC and you can usually pick them up used for really cheap - i just got one on TBW for $35. it's pretty low-frills, and the regular size works great for petite folks, if you're more than about a size 12 you'll probably be happier with the larger size. the Babies Beyond Borders is also a less expensive option, i just got one and have only used it for a couple of days but i am really liking it so far. $85 including postage from the BBB website or from Heavenly Hold. Patapum also makes a toddler sized carrier. i tried one on once (it was a friend's) and it seemed pretty comfy. i used to have a baby sized Patapum that i quite liked, so i imagine the toddler ones are pretty decent, and they're not too pricey either.
I would love to try a Kanga XT or toddler Dream Carrier, but it definitely not in my budget right now, even buying used they were more than a new BBB. and there are a lot of good toddler-worthy carriers out there that are good quality and pretty reasonably priced.