Individual wire pairs have shielding, which makes them even better than Cat 6 at reducing crosstalk/system noise. They are backward compatible with Cat 5/5e and Cat 6.
Class F Cabling
These cables are fast and future-proof, but also more expensive. Consider what speeds are necessary for the network before paying extra for capacity that may never be needed. Cat 7 cable costs about $0.98 per linear foot.
Costs vary greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.