There's no compelling reason for Cat7 or Cat7A cabling. If you can buy Cat 7 cable on the market now, they are likely very old cables that has been sitting in some warehouse for years
Cat6A supports 10G ethernet up to 100m. If you need to move further up in speed for future proofing, you should install Cat 8 cables that supports 25G/40G, but it is only for up to 30m, for data center applications.
If you are going for Cat6A cable, I would recommend installing the shielded version of Cat6A, rather than UTP. Make sure the jacks, panels and patch cables are all Cat6A shielded. BTW, Cat6A uses RJ45.