Curt,
I am in the exact same boat, my friend. Mine started acting up just as the other started feeling athletic again. I think our situations are fairly common, unfortunately. You don't say (in this post), but I imagine you have FAI?
At your age (45, I am 43) I suspect you are going to be told the same things I have been. I have been going to a surgeon who corrects FAI and labral tears here in Boston and I really, really respect his opinion. While he would do the surgery if I really wanted it, I think what he believes (I hesitate to put words into his mouth) is that at my age the outcomes for that surgery are not that great, and it is really just a holding action before ultimate replacement/resurfacing.
And searching on the web (there is a good Yahoo FAI message board, if that is the underlying cause of your OA) has opened my eyes to the fact that the success rates for that surgery are not what they are with replacement/resurfacing. While I am sure that an absolute majority of people experience good outcomes, there is a very real percentage of people who don't. And I think success (at my age) would be just five years before resurfacing.
I posted to that Yahoo message board and people who have had that surgery basically responded back to me that if I had resurfacing and was comfortable with that, then don't bother with the surgery they had. The responses were really completely different than the ones on this board, where everyone is like, yeah, definitely have the resurf.
This is just my opinion/experience. By all means explore all your options. I am still meeting with the FAI/Labral surgeon, though I think when I next meet with him in December he is going to tell me (after looking at my Arthrogram) that he is even more "pessimistic" (for lack of a better word) about my outcome from FAI/labral surgery than he was previously. I think the arthrogram will show more extensive joint space narrowing than the x-ray.
Been a few tough months (mainly mentally) as the "good" hip very rapidly deteriorates. But I do really appreciate that I better understand what is happening to my body than I did the last time. And since I (just the other day) kind of decided on a resurf for the other hip, and have taken steps in that direction, I find myself in a distinctly better frame of mind as i envision a future finally free of the pain and disability.
And if FAI isn't your issue Curt, please excuse my length.
Mike