If you buy the standard definition package, you can add the installation at £79.99. That is a very good price (two years ago to adjust my dish the local company charged me £40 for a 5 minutes job!) and I believe you can ask to set it at your request (to receive British channels on Astra or European channels on Hotbird if you prefer).
They also have HD Satellite Kit with USB Recording Facility for £159.99 + installation if needed.
I suppose you could also combine different kits (for example the one with motorised dish to get the most of the channels).