Your best bet for prem football (apart from the obvious sky/setanta route) is to buy a subscription card for Digitalb package which transmits from 16east.You would need a 90cm dish min and a suitable receiver such as a Technomate 1500ci.
Your virtually guaranteed to get 90% or more of the big clubs matches i.e Man U,Arsenal,Chelsea and Liverpool.
I myself have a 1.1m motorised dish along with a Technomate rec and digitalb card, and its great for me as a Man U fan.