Hi P-Dub, I really related to both your question and Pat's reply. Four or five years ago (age 44 or so), when my hip problems were diagnosed as osteoarthritis, my reaction was: what can I do to keep playing hockey at a competitive level? Unfortunately, resurfacing wasn't FDA approved at the time, and the answer from 3 docs was "nothing." After diagnosis, I could play with diminishing capabilities for a year, and then I waited another year until I had the surgeries.
Now 2 yrs after surgery, I'm just starting to play hockey again. My surgeon says no restrictions, and my first attempts have felt good and gone well. But after 5 yrs, it's not as important. When I couldn't play hockey, I filled in the time with other recreational activities. And one has to consider that goaltending is getting attention as inherently stressful on hips. But I rationalize that I had FAI, so I think that my shiny, smooth, new hips shouldn't cause recurrence of hip problems. But then again, I worry that I essentially wore out those couple body parts through active, somewhat extreme activities, and I wonder about the state of knees, shoulders, head (well that's what my wife wonders about :-) ), etc.
I'd say, have the surgery. Recover an active lifestyle. It sure beats the situation we'd have been in 50 years ago. Depending on your age and commitment to rehab, the prosthetic will likely not preclude a return to extreme skiing (of course, talk to your surgeon). But I think that it may take a couple years, at least, out of your career, and you may find that your perspective changes with the couple years and the fake hips. I was, and am, ecstatic that I could again ride a bike for hours or play basketball with my son, or go for long hikes. We're talking about hiking to bottom of Grand Canyon. Just 5 years ago, when I was diagnosed, all these things weren't in the realm of possibility (based on my advice at the time to have small-ball replacement).
I posted recently about hockey, and mentioned my surgeons response (it's classic) when I asked about goaltending. He said that he couldn't see any technical, theoretical reason why I couldn't, but that he'd never heard of anybody doing that activity yet. So he said go ahead and give it a try, but let him know how it goes.
Good luck,
-Dirk