Welcome to the forum Peppy,
You can still pick up the free-to-air channels from Astra 28 east with your current dish and
Sky receiver. For a test remove your viewing card and see what is left.
For European channels you will need a larger dish (maybe 80cms) and at least a free-to-air receiver (from about 80 pounds).
What did you have in mind a fixed dish for one satellite, or a motorised system for many satellites which of course will knock the price up quite a bit.
Have a read through the forum and see what is best for you, and then ask again ok.