The thing with hysterectomy is that it is not a cure for endometriosis. You don't say how old you are, but chances are that you'd have to have HRT and the endometriosis is 99% certain to come back. They only have to leave the tiniest spot inside you; it could be invisible to them, but it will feed on the HRT and you will find yourself back in the same situation you are now.
Also, hysterectomy is major surgery with all of the inherent risks it brings in itself - I'm not even considering a hysterectomy for the reasons above, but even without that, my gynae has told me that there would be a huge risk of puncturing any of the other organs involved - which is pretty much all of them! - and I could end up with a whole new set of problems. On top of the endometriosis which would almost certainly grow back even more viciously given all of the extra scar tissue a hysterectomy would cause.
I've been on and off Prostap/Zoladex for 15 years or more now, I'm 46, so I've possibly got another 10 years of it but surgery is out for me, unless the situation ever becomes life threatening (I was diagnosed after a cyst twisted on its stalk and ruptured, it had to come out because of the risk of infection. Now I'm scanned every 6 months to make sure there are no cysts growing, and if there are, they're zapped with Zoladex before they get too big!).
At the end of the day, only you and your gynae can decide what's best for you, but if anybody tries to tell you with 100% certainty that hysterectomy will cure you of endometriosis, they're wrong. There ARE some very lucky ladies out there, but they're in the minority.
Good luck, and I hope your new consultant comes up with a plan that works for you