jaytor -- I recently retired to a small town in Hawaii where high end retailers are few and far between, but I lived in L.A. for most of my life and for much of that life I've been an audio enthusiast.
In those days I always put my money down at brick-and-mortar stores. It was truly seldom that I resorted to mail order. It's just an incredible luxury to go to a quality retail outlet and have them put on a demo for you, letting you bring some of your own stuff for a good old taste test. I want to see the merchandise IRL and flip switches. It's only when the stuff is up to snuff that you take it home for the night. Plus, I just hate waiting for a delivery guy to show up. Even worse is waiting in an endless line at the post office/whatever to do the return.
As an aside, I gotta tell you, too, that, like several other posters on this site, I'm a ready-to-be-committed bicycle enthusiast. And, when it comes to bicycles my brick-and-mortar predilection is even more extreme. I've bought high-end bicycles from Bicycle John's in Burbank, I. Martin Imports in West Hollywood, and Velo Pasadena. I bought my current ride, a Campy Chorus Bianchi Infinito, at a place that was within walking distance of me for a while (I can't remember their name but they were in Sherman Oaks). The only high-end bicycle I ever bought sight unseen was a Rivendell Ramboulet...which turned out to be the one I liked the least and got rid of the most quickly. Beautiful to look at but a dead dog for actually tooling down the road. Now I'm happily downsized with just the Bianchi and a modestly built-up Tomac Buckshot.
Long story short: If I could still buy at a brick-and-mortar store I would, but that luxury is now in the past. I can say, though, that I've found a couple of dandy high-end bicycle shops in the vicinity and always do my best to patronize them. It did, though, take an agonizing amount of time for one of the bicycle stores to score me a fresh set of cleats for my Mavic pedals.