The single most important consideration in choosing a surgeon is: how many times has he performed the exact procedure that you are having done? He can have an impressive resume in terms of having trained and worked at impressive places, but that doesn't make him an expert at your kind of surgery. A lot of times vr.com members will recommend surgeons to each other, but then it turns out that the surgeon in question has mainly mitral experience when the needed procedure is AVR, for instance. People tend to underestimate how specialized this stuff is.
My re-operation was done by someone who operates only on the aorta, a pretty uncommon specialty, and based on my experiences, I only recommend aortic specialists for operations on the aorta. There are undoubtedly competent people out there who aren't famous and who aren't necessarily aortic specialists; the problem is, it is hard to identify them because they aren't famous and they aren't aortic specialists. And then, there are people who purport to be competent in what they want to do to you, and they appear totally confident, but their skill is more questionable. I'm sure that many or most of them truly believe they are as good as anybody, but they do not have the experience to back it up.
Taking for granted that the David procedure is right for you, it is not a commonly performed operation, so I wouldn't guess there would be a large number of surgeons who have performed in the hundreds. Your proposed guy has done 75, which I wouldn't personally be comfortable with -- but then, I went through what I went through. Tcopel, if your surgery is just around the corner, are you how open are you to making a change? I'm not saying you should or shouldn't change your plans, just that you can drive yourself crazy by undertaking a major project like this at the last minute. If you've decided, you've decided. If you're really not sure you want to be operated on by this surgeon, then maybe you need to take more time to decide. But then, you have an aneurysm. If you back out of this operation, that entails risk in itself. It's a tough call.