I’d forget about building youself – nowadays this just adds cost.
Can you explain your reasoning behind that comment?
Yup, the last few times I’ve looked at buying wheels I’ve spent hours trying to find source all the parts individually for a good price and then eventually worked out I can just buy a factory wheelset of similar/better quality for the same price/cheaper plus I could’ve saved myself all the hassle of calculating spoke lengths, finding good prices from various sources, lets not forget that you have to build the things too – your time is worth something.
The DIY route works if you need something a bit unusual, or already have some of the parts, or get some of the parts super cheap 2nd hand i.e. if you are patient enough on eBay you can get some nice DT 180’s for a good price. However, based on the brief of getting a typical light/stiff upper-mid range wheelset from scratch then I don’t see the point of going custom anymore as the factory wheelsets generally come out of the box built to a good standard.
For 700UKP I’m generally thinking of something around 1400-1500g carbon, aero/semi aero. The mavic low/mid range wheels are a bit flexy and rubbish aren’t they so they’re not a particularly good benchmark.