[shilala]

I haven't had it done, but I'd do my back surgery all over again if I had to.
The worse that can happen with a shoulder is if they leave it off, and if it hurts anything like my back did, it's worth it.
They don't run into this kind of surgery, so you must have exhausted all the options.
Balance how good your hip feels and flip a coin.
If you don't find anyone here who's had it done, I'm sure if you look you'll find a joint replacement forum out there. Read up and talk to the folks there.
Good luck, Marc. Our prayers will be with you, my friend!!!