Domke made the best bags around (in the USA!) for a long time, unless you want to pay Billingham prices, which were absurdly over the top. I have several Domkes, a couple up to 25+ years old. The problem that came up around the middle '00s when I went to look at a new F5XB is that the quality of the material and stitching isn't anywhere near as nice as on my F5XB, which I bought new somewhere around 1990 or so. They're also skimping on the material and length of the overflap now, and the price is 3x what my F5XB cost me back when, even in adjusted dollars.
I think this happened when they moved the production offshore. All of mine are old enough that they were made in the USA ... I have F5Xb, F3x, F6, and a very ancient, unnamed one I bought at a flea market with a Rolleiflex 3.5MX in it for $90 in 1983. I gave my F803 to a buddy in England a decade ago ... he's still using it. Excellent bags, all of them.
All of mine are made in the USA, they have all been purchased within the las dozen years or so. ??
But for stuff I can buy new, now, with that old level of quality, the A&A and Billingham bags just satisfy me more.
G