The Nikon Action EX 10x50 is within your price range. It is waterproof and purged with Nitrogen with a good rubber armouring. It is also quite chunky, weighs 1020 gm and focusses down to 7m (from the spec, CF means central focussing not close focus I gather).
Personally I find the eyecups far too big for me (I need their eye relief even though I don't wear glasses!), but that is probably not really a problem for most people. The objective covers on mine are of the easily lost variety, they clip in.
I think that they have had more use mounted on a tripod than any other because of their weight. They must have been bought over 10 years ago, so longevity is not an issue.
On this wet dark Bank Holiday Monday they provide a perfectly good crisp image. I tend not to see many of the faults other folks seem to have with binoculars in general, but at this price point they seem to be OK for my uncritical eyes.
Personally, I find 10x42 is a more useful size, but there are so many out there I wouldn't know where to start at this price point.
I would suggest looking at the Barr and Stroud range of roof prism binoculars. You will probably be directed to the Optical Vision Ltd website.
I have the 12×56 ED Savannah, which I find to be very good. They also make a 10×56. You should find these at around your price range.
They also make 50 mm and 42 mm binoculars. Probably in 10 times magnification and maybe lighter than the 56 mm. But I don't find the 12×56 to be particularly heavy.
It would be better if you could try these binoculars in a shop to make sure they're suitable and buy the best one you find. As with all binoculars they probably vary from one to the other.