rans6andrew,
I would look very, very closely at the small print and all addendums to the small print before you decide to go landlinesless, 4G only .....
The mobile networks tend to be far more aggressive in their capacity management than even the worst of the fixed broadband providers.
If you're ditching the landline and so doing Skype, VoIP, Streaming, Downloads, VPNs etc. all through the mobile network, I'm not entirely sure things will be entirely rosy in the garden for you.
Just sayin'....