Blum are very good and have a large range. I do not think you can beat their soft-close hinges and drawers. You can change the hinges to wide-open if you want as they fit the same. I think they are priced high because of the name.
Hafele have some good accessories such as Le Mans corners, drop down shelves and pull-out cabinet shelves and I think are better value.
Top-hung sprung hinge assemblies are quite expensive.
You can look at their entire range with the online catalogue. Many retailers do not stock the entire range because it is huge.
I don't like door-in-frame and they need non-standard hinges.
Ironmongerydirect have a good range and quantity discounts
You can buy, say, 50 hinges at a better price from online suppliers as they are sold in vast numbers. Sometimes you see stock on ebay that I think has fallen off the company van into the fitter's toolbox.
I have seen imported items from Eastern Europe where I don't recognise the brand, some of them are OK but lack the genius detailing.
Perhaps I was unlucky but I thought the B&Q brand was awful.