I agree for the most part about the high-end custom guns. a few years ago, I bought a plain-Jane Colt and brought it to a gunsmith for replacement of the hammer, safety, levers, springs, trigger, trigger job, Trijicon sights, fitting, reblueing, action/feed job etc. What I put into it would have bought a new Les Baer or at least a Wilson.
That said, Kimber, Springfied, Para, and now companies like SIG and S&W are producing factory guns that shoot very well, over a wide variety of ammo, things that Mil-specs would never do until a few years ago. If you can afford a custom piece, buy one! They are great and worth the money. However, I don't feel handicapped with today's high-quality factory guns either.