Hi Lizard,
As you know, this important decision affects you and your health, so only you can decide if and when to undergo this major surgery. Yes, it's major, but as others have stated here, when you chose an experienced surgeon, the chances for less than optimal outcomes are exceedingly small. Experienced surgeons publish failure rates at less than 2,3 percent. And this isn't simply post-surgical failures that occur within the first several months. These are failures for all the active patients that are performing all sorts of hardcore activities going *ten-plus* years out, including patients who have complications that are not related to the skills of the surgeon and/or the device (e.g. some unlucky patients have poor bone quality).
So, IMHO, your choice to wait should not be founded solely on focusing on what could go wrong. And as chuckm stated above, be skeptical of the advice and opinions provided by surgeons who do not perform hip resurfacing. These physicians appear to be unfairly biased against HR due to a variety of possible factors, whether that be the loss of potential business, or a reliance on anecdotal accounts of failures by inexperienced surgeons etc. Probably the most disappointing and eye-opening episode of my story was my interactions with my local surgeons/sports-medicine doctors. Their failure to provide me with an informed and honest assessment of HR was a let down to say the least. And my story wasn't unique. I'd guess most of us experienced the same exact pushback from our local surgeons.
The part of your reasoning which allows me to *not* provide encouragement to rethink your choice to wait is the fact that you're currently satisfied with what you're able to do athletically, and not in any great pain. Nobody should feel compelled to undergo any surgery if they're not properly motivated. So if you're happy right now, then wait. In this website, they always say "You'll know when you're ready.". Then again, they also always say (and that includes me), "Damn, I wish I wouldn't have waited so long to do this!". :-)
So please continue to visit this site, and do your research. Hopefully you will at least be able to lessen your fears of the (rare) downsides of this surgery.
Good Luck.