Cannondale SuperSix Evo kids bike

This is the bit which everybody recommending expensive wheels seems to be ignoring. If you spend £1k on some carbon bling and then get sent straight back to Shimano R501s for want of money the first time you get involved in a Cat4 pile-up, it's all for nothing. If you're not racing, the 10s per hour you save by getting 60s over 30s is utterly irrelevant.

You're ignoring the awesome noise that deeper rims make.