Bad back - baby carriers?

I have a really screwed up back and I am looking at the soft carriers and I am wondering if any other bad back mommies found one that works good for them? I am also plus sized so it needs to be able to accommodate my girth :-\

They never helped my back. But I have triple D boobies so... lol

I have an Ergo and LOVE it! It's great on my back. And they have waist extenders.

I heard Moby's are good too.

Yeh I'm a 50j   Part of my back problems. Thanks I will look into that one! Mobys confuse me :">