Don’t bother with M475 hubs. For the couple of quid you’d save they are false economy. M525 hubs have far better sealing and if looked after, will oulast pretty much anything.
I’d be more inclined to save money on the hubs (M525s are good enough) and spend extra on the rims and spokes as saving weight on the edge of the wheel will have more effect then saving weight at the hub
WTB rims are fine, but if you can stretch to a Mavic 717 and double butted spokes on M525 hubs, you’ll have a nice set of wheels
Personally, I’d be looking for seconhand at that price. There’s always plenty of QR wheels going begging when people upgrade to 20/15mm axles