Did you end up upgrading your router to one with 10gbps ports, redo CAT6 cabling at home to desktop, upgrade ethernet to 2.5/10 gbps or .. just let them be?
Moi went with Whizcomms after I started the thread, now contract ending, if you renew 2.5 gbp, it's 24.99 a mth. If you go 10 gbp, it's 28.99 a mth. Both without router. Moi when with 10gbp causes too busy to switch telco