I am thinking the better ( expensive) cable the better result. Now, it sounds more like I am driving a Rolls-Royce for a delivery job. Thank you for the advice.
Thanks. I like that comment, it's very astute and amusing.

Though equally when you're having infrastructure (cabling etc.) installed it's often the manpower that is the big cost, so better quality equipment can add a degree of "future-proofing" at minimal extra cost.
Obviously none of us know your premises and exact constraints, but I'm definitely not alone in thinking that just using the Wi-Fi from your router is probably far from ideal.
With wiring around your property that's an ideal opportunity to use it to install one or more Wi-Fi access points and get really good coverage. So much better and cheaper than any type of Wi-Fi only repeater (including the BT discs).
It so happens that my own house has a master socket downstairs just inside the front door with the router next to it on a small shelf; that provides decent Wi-Fi coverage for part of the house. I have a WiFi access point at the rear of the house near a patio door which completes indoor coverage and also provides useful signal out onto the patio.
And while I do use some LAN cabling (including some over unobtrusive 4-core phone cable) the link to my access point is actually via "Homeplug" (LAN over mains) as that happens to be a more practical solution for me. I have two separate consumer units due to extension work but the "Homeplug" components are on the same ring main.