I seem to remember when I was looking around for second/third opinions or better treatment that a leeds clinic was being recommended a lot, having a quick look it was Stuart Calder was a name I saw recommended, but it's worth going on a few sites like ..
http://snowheads.com/ski-forum/viewtopic.php?t=91354
These kinds of forums tend to have a lot of guys who have ACL injuries, can give good advice, that is a kind of update thread for ACL injuries which you can get a good idea of general rehab and some people link to sports therapists, most tend to say who their doctor was and give a good idea of eventual outcome from injuries.
they are generally good stories, where I think everyone got back to skiing in 6-12 months. What a lot of it boils down to and what you've been advised here also is, rehab. The first guy in that thread had a NHS physio and they didn't seem to know what to recommend, why they were recommending it and likely slowed down his recovery. He eventually(unimpressed) got discharged from NHS physio, so went private and seemingly got far more detailed work, far more advice, was pushed far harder but in the right way and showed significant improvement.
Most of the advice here and where you'll read most places is, get the rehab right and there is no particular reason to think you won't be back to full strength.
From what I know and experienced, lots of doctors do NHS and private work, private gets you better rooms and shorter waiting times but not necessarily better surgery. NHS physio's.... do not work private, they have different goals to you, they have different aims. Do everything you can to get the best physio you can afford/find.
There is probably a particular football rehab style forum somewhere as well, don't get disheartened if you do read a bad outcome, I'm entirely not going to say that everyone with a bad outcome did a poor job with rehab, but keep in mind that a lot of bad stories could be more down to poor physio/rehab advice from often crappy NHS physio's. Lazy rehab, not willing to work through the pain or dedicate yourself to getting better are also reasons for failure. Find a good physio and work hard and the outcome will be positive for most people.