I would be looking at far eastern imports with your budget, but even that might be stretched. If you're after the aero benefits, I'd also think you need somewhere in the region of 50mm at least. I have both 40mm and 65mm wheels, previously had lots of 50mm. There is a performance difference the deeper you go, but also in cheaper wheels, a weight penalty.
Example of far eastern wheels here....https://www.yoeleobike.com/disc-brake-c ... b-std.html
MatthewFalle from here is a long term user of far eastern wheels, hopefully he will be along soon with other suggestions.
Agree completely with comments above re depth/aero.
I see wheels as a disposable item so use "good" carbon deep rims all year round - so long as you hose them down after using in ganky weather all is cool. I'm also pretty hard on them and can see through marketing bullshyt.
Suggestions as per the thread, however in addition, I've used:Carbonzone off the 'Bay
( 50/50, 50/60 and 80/80 - or they could be 90/90. Who knows...) for years for racing, training communting, going to the shops etc - faultless. Light, spin well, roll really nicely, bomb proof and none of the fabled delamination even after a week of bombing down the Alps at 100km/h+ and weeks of using them in the Abruzzo mountains.
The 80s (or are they 90s - not sure) are on my S3 in the "Readers Rides" bit of the forum so you can see what they look like). Not too bad weight wise but the 50s/60s are actually very light indeed.
Wet weather braking is fine - nothing to blow your socks off but fine - you stop very well, progressive, all that jazz. Planet X
are also an option - very well priced, really nice and light, easy to get bits - I've iused their 50s for racing (Cat 2 & 1) and training with British Championship winners, Commonwealth Games and World Tri level guys 'n' girls and they are now my summer holiday home wheels - perfect. Have needed one set of bearings in 10 years and tens of thousands of K in all weathers. Never been trued and still perfect.
Planet X still sell their own branded and also sell Selcof
wheels, however knowing Planet X they are the same ones so just choose the colour you like best. Farsports
are very well recommend (I've had a pair in the past and all very cool - never had a problem) as are Prime
from Wiggle. I was about to buy some of these but spent the money on blow and hos in Belize instead.
Planet X were also knocking out Campy Bora
with Shimano hubs for £700 or so a while ago, so they may still have some left.
I've never had any difficulties on the wind with the above wheels - the 80 front can get a bit wiggly in real gusty but just throw a 50 or 60 on before you leave the house and all is well.
They all use the same Sapim
spokes and Novatec hubs
as more expensive brands.
My caveat is that I only use tubs and caliper brakes but I can't see why anything should change because its disc.
Avoid Hunt because they are just the above with a Hunt sticker on them and a £400 mark up - average wheel, not worth the extra at all. Nothing at all to make them stand out. I've built two bikes with Hunt wheels anf for athousand pound wheelset... well, there are some big windows at Hunt...... Do a search on here for posts passim and you'll see a lot of people say the same.
Overall carbon wheels are cooler, more fun, better noises, look better and are lighter than ali, so as a spare pair you have no reason not to. As you are running disc, you have no reason not to use them all year round tbh.
Hope that helps - anything else you need shout anytime.