Hard to say how you should deal with the wife, but yes, I think you did fine. This wasn't an impulse purchase. You did your research. You shopped around. Sometimes, a garment speaks to you, and if this one did after you did all that, you should have no regrets. For all the folks say about this about this brand and that about that brand, it still boils down to fit, and it is way better to wear JAB that fits than Brioni that does not, and that's where good SA's come in--they'll do their best to stop someone from walking out the door in a suit that doesn't work for them. It sounds like you found one, and a good SA is rare as hen's teeth these days. Ideally, clothing purchases should be built on relationships, and those relationships are really hard to establish these days because everyone already knows, or thinks they know, what they want, and there is no value placed on knowledgeable SA's who take the time to ask the right questions, look at you, look at the what's on the rack and really help put something together that will keep you coming back. Parenthetically, the same is often true of tailors. A lot of folks seem to just think of tailors as alteration machines instead of partners in achieving sartorial perfection. Good tailors are usually not the cheapest, but they are always the most valuable.
And good luck with the wife. My own has been infinitely patient as clothes became important to me after we were already established, and so I am very fortunate. Everyone should be so lucky.