One of my dearest friends had prostate cancer a year ago. He opted for the robotic surgery. (His was done at Vanderbilt in Nashville, but it's available several places.) If you have to have a prostatectomy, apparently this is the way to go. Less pain, fewer long-term side effects, and much faster recovery time. A week later, he was walking 2 mi./day. Two weeks later, he was back to 3 mi./day, his usual. I haven't asked about impotence...his wife would kill me.
But from what I've read, your chances are much better.
There are tons of links...just google "robotic prostate surgery."