I have a huge collection of bridles, and some of my favorites are my older Bevals, Dover Wellington, and older Crosbys. Unfortunately, I hear Beval’s quality has gone downhill, but both the older Bevals and Dover Wellington were made by E. Jeffries, so if you can find a Jeffries bridle, it should be of very good quality. Exselle the same product as the older Crosbys (which I find to be extremely durable).
I have some from both Hadfield’s and Edgewood I really like as well, but both are older pieces and I’m not sure how much has changed since then.
As far as Hadfield’s goes, mine and another I’ve used have both been beautiful and sturdy. The only thing is that it does have sort of a color corrected finish that some people may not like. It’s probably one of the prettiest bridles I own out of a collection of around 25, though.
I agree with mychestnutvalentine that my experience with Edgewood is that it’s great when not over-oiled, but I think most people want to go from bright orange and stiff to almost black and floppy overnight, and end up ruining them and causing them to stretch in the process. It’s very rare I find a used Edgewood that isn’t over-oiled, unfortunately. I’ve also picked up an older Beval and Crosby that were that way and they’ve been extremely hard to bring back from being non-sticky/greasy and both are still lifelessly limp and floppy, which is a shame since both are great quality bridles.
I have Jimmy’s and love them as well, and would love to get my hands on a Bennett’s. They’re made by Jimmy’s son and he has a Facebook page called Bennett’s Hunter Fine Bridles.
Another one I like that is still in business and has a website online is Moritz. They’re made in England and are of very nice quality.
I unfortunately haven’t been super fond of a lot of the French tack I’ve seen, mostly because I like tack to be very durable and sturdy, and don’t care for anything already really floppy, as it never tends to wear well.
If you want something that will last, you can’t go wrong with Stübben. However, it’s a coarser and sturdier leather that only becomes buttery soft after many, many years of use.