light wheels (<1500g), <1100£

i have those bikes too. what i dont like is the issues to find parts if somthing is not working. gladly i found that company https://www.autoprolocksmith.co.uk/bicycle-lockout/ since they have all the parts for that model. do if you have anything just give a call. 

I can highly recommend Spokesman wheels (ebay or website) for a really nice set of handbuilt wheels where you can tune the spec to suit your budget. For this price range you'd get much better value for money than 'off the shelf' brands.

Go handbuilt. You'll get a better, stiffer lighter wheelset and have someone nearby to repair or rebuild them in the case of damage or wear. Much better for the planet and better for your pocket! DCR built me some great wheels, there are many others too. I just wish I'd listened earlier to the people who'd told me to go handbuilt.

if you want off the shelf - https://www.wiggle.co.uk/shimano-dura-ace-r9100-c24-clincher-wheelset-1

Hand-built- speak to David at DCR Wheels.

These with bitex hubs: https://www.lightbicycle.com/700C-disc-bike-wheels-27mm-wide-24mm-deep-c...

Or you could get some Fulcrum Quattro Carbon Race.....bomb proof and made by Campagnolo....

https://www.tredz.co.uk/.Fulcrum-Racing-Quattro-40mm-Carbon-Disc-Wheelse...

At your price range you can drop weight from the current wheels AND go aero. So win/win. The Hunt 52's and 50's are also in your price range, and the weight difference is about 1/5 of a full water bottle. (or a pre-ride poo).

If you're doing 1,000m elevation gain for every 50km, I imagine you're one of the people who would benefit from prioritizing weight over aero (although I haven't put any numbers on that!).

I think there are a good handful of other companies that offer relatively cheap and light wheels - Scribe, Parcours and Pacenti all spring to mind. Or cut out the middleman and order straight from lightbicycle or similar.

I would say that with any rim brake wheels, I think there is an argument for getting off-the-shelf components and investing in a good hub. Then when the rim is worn through, you can get any decent wheel builder to replace the rim, for far less than the cost of a whole new wheelset.

The aero benefits of deep rims will depend on how fast you ride. As you include plenty of climbing in your rides the likely benefits would be on the descents, but if you're going as fast as you want to already on the descents the only real difference will be that you'll wear out your brakes faster. I think the real benefit of deep rims is to be found by fast riders on the flat. 

There are quite a few options around and you may struggle to find anyone who has done an exhaustive/objective test against them all.  However, my view is that anything decent and around 1500g for the set will feel light for hills (I do quite a few of varying character) and something around 40mm rim should help balance out speed/climbing and side winds.  I have a slightly earlier version of the Fulcrum Quattro carbons, which are 17mm internal and seem to work really well (decent braking too, which is always a bonus!!).  Now these are called the "Wind 40C", and can be had for about £900.  The specs will say "28mm tyre" as they are optimised for that but they do work very well with 25s too (I have run both but prefer 28s now).

Why not speak to a good wheelbuilder and get something exactly suited to your needs for that money?