For surgery, if sexual function is important to you, ask what the chances are of the procedure being nerve sparing (i.e. saving the nerves that generate erections). Ask if Neurosafe will be performed, whereby histology checks during the operation if it's safe to spare nerves. (I'm only aware of one hospital which does this on the NHS, although the NHS was doing a randomised blind trial in other areas too, where you have a 50% chance of having Neurosafe, but you won't be told before or afterwards.)
You might also ask if the surgeon does Retzius Sparing technique, which tends to lead to faster (and often immediate) recovery of continence. There are only perhaps 5-10 surgeons in the UK who do Retzius Sparing, and they tend to be top surgeons anyway. A year after surgery, the figures for continence are the same Retzius Sparing or not, but it gives you faster initial recovery. Doesn't make any difference to erectile function, except that top surgeons may be better at preserving it whichever technique they use.