BeagleBuddy,
I want to add my vote to those saying that the surgical approach is just one of the criteria you use when choosing a surgeon, and not necessarily the most important one. I'm embarrassed to admit that I did next to no research, I was referred to Dr. Gross because he is the closest geographically so I went to him.
A cousin had told me to get the Birmingham HR but the Dr. told me he doesn't do those, but he has done 3000 HR's so I didn't look any further.
As for cost, there was an in-depth article in the NY Times a couple of months ago about a US patient whose insurance wouldn't cover - in his case - a THR. (Say what you like about Obamacare, but at least it does away with the pre-existing condition clause that hit this guy.) He had it done in Belgium for a fraction of the cost of the US equivalent. Apparently the device manufacturers charge much more in the US than overseas, even though they are manufactured here, not to mention the astronomical hospital fees.
The question came up about why these providers charge so much and the answer boiled down to "because they can."
Enough ranting for now, good luck with whatever you choose.