Cat7 is not a recognized standard by TIA/EIA, but there apparently is an ISO standard for it. Also, cat7 doesn't use RJ-45 connectors so it's not backwards compatible with older gear.
Cat6a is probably the sweet spot for home/office/etc structural cabling. It's not much more expensive than Cat6 (or Cat5e in case people are still putting that up), and has more than enough legroom.
Cat6a is probably the sweet spot for home/office/etc structural cabling. It's not much more expensive than Cat6 (or Cat5e in case people are still putting that up), and has more than enough legroom.