Nobody mentioned 10Gbps, but if you are running cable by far the biggest cost is the labour. Run Cat6a today and you are future proofing your installation for at least 20 years probably longer. Skimp on it and use Cat5e and if a few years you may well be regretting it, and the cost of replacing a length with Cat6a will now be more than the cost of just doing it with Cat6a in the first place and we are not taking into account the disruption from ripping floor boards up etc.

If you're ripping up floorboards them just install some conduit with Cat5e and a pull cable. Future proofed for life without ridiculous overkill.

Cat5e is more than enough for the average home user.