So lets do a quick break down of cable speeds
Cat5e = 1gbps
Cat6 = 10gbps to about 50ft, 1gbps beyond that
Cat6a = 10gbps up to the full length (which is 300ft)
There is no such thing as cat6a switch, there is only 1gbps switches and 10gbps switches (and a few other speeds).
If you want a 10gbps network then all of your switches and computer network adapters need to be 10gbps rated (this is still quite expensive).
Your patch cables should be cat6a, and in-wall cables and walljacks need to be cat6a
For 1gbps you can connect anything from cat5e to cat7 cables together and it will work just fine.
Typically the desired setup for a wired home is modem connected to router (if modem and router is sperate), the router connected to switch, and...