In reply to stevo 30: I had both ACL and PCL done 25 years ago with synthetic replacements as the technology wasn't up the the tissue grafts you can get today. The surgery was much more invasive than it is now and left me with something that would win hands down at a knobbly knee competition!
Following the surgery and rehab I actually did my best climbing and mountaineering ever for many years and it is only now that the arthritis from the original injury is seriously slowing me down - this would have happened anyway and was amplified by the 4 years of 'normal' usage between the injury and getting it sorted. My advice is to get the best infomation you can before you make any decision and don't be rushed by anyone. There are positives and negatives and you are the only one who can judge what they mean for you. In my case they stack up like this;
Positives - stable knee in all life situations, back to all mountaineering without fear of knee collapse at the wrong moment, return to non-contact sports, return to the company of friends do what I wanted to do and not excluded due to fear of consequences for them and me if knee collapsed.
Negatives - limited flexion of knee, inability to kneel very easily both in terms of movement and discomfort from pressure on the knee, sensitivity in the knee when knocked (due to tissue disruption), debilitating arthritis but the chances are this would have happened anyway, loss of strength in the affected leg - it never was the same again!
Overall, I don't regret having it done but it was done by a top man of the time and it was a gamble, also I didn't ask enough questions to fully understand the end result. If kneeling is important to you job press hard for information on what the outcome of the operation will be in terms of flexion and discomfort - these days it may be a lot better than mine!
Good luck with your decision making,
Andy