Replacing Spark Technicolor TG589vn (ADSL/VDSL)

I have VDSL coming into my existing TG589v which is then plugged into an Apple Airport Extreme. All my devices connect to the Airport for WiFi and the PS4 is the only thing wired into the TG589vn.

I want to make better use of the gig ports on the aiport though so am thinking of wiring as many things to that as possible, but assume the 100mb ports on the TG589vn would cause a bottleneck.

I can buy the newer Huawei HG659b (FIBRE/VDSL/ADSL) from Spark but I'd ideally want just a modem/router and let the Airport handle WiFi.

1. Does this sound mad?

2. Any recommendations?

Thanks

:)