In reply to:
It really doesn't affect sky in any negative way to choose a better router for your needs, and if it gives people a better connection/better lan and or wireless lan ,then its definately a good idea to change your router if you feel confident in what you are doing.
actually I don't.
The service provider is providing you with a CPE which it says you must use to connect to their network.
If there are problems with the CPE, and you don't use it, and don't tell them, then those problems just won't get fixed.
In reply to:
I think the term "your broadband box" might be just a little bit too wide-ranging to stand up in court! I have lots of broadband boxes!
Broadband Box is a term that is defined at the beginning of the T&Cs I believe.