a wingnut? expensive, fragile, IME. the larger packs are better for riding with more stuff though.
like a lot of packs (including the wingnuts) they’ll bounce around if you over-pack them.
had an osprey talon 8 for about 5 years. damaged a pocket in a crash (hole in fabric and damaged the zip) about 4 years ago and more recently damaged one of the bottle holders when it turned out there really wasn’t room for me and a water bottle to go past a tree at speed.
just taken delivery of the evoc pro and while undoubtedly well made there are a number of aspects i’m not overly impressed by given the price and rave reviews it’s had. the bottle holders are not good compared to the osprey and i can only imagine they didn’t bother looking at these with any real consideration. the osprey has a really nice system which keeps it’s shape and let’s you easily pull and replace a bottle while riding. i don’t think this will work with the evoc at all. suspect i’ll end up getting a bladder for it. also the rear pocket could do with one zip up one side and along the top, rather than the arrangement that has both zips joined together – i don’t see the point in it as you can’t pull both zips up at once. the side pockets are too small. having said all that the waist belt seems well designed, it’s easy to put the pack on as a result, seems comfy and appears stable.
in light of this i’d recommend the osprey packs. montane also have one that looks for all the world like the osprey which i’d go so far as to suggest it’s just re-badged or at the very least made in the same place by the same people..