Unless you want to enter into a contract with SKY then the only option you have is a Freesat box.
Humax make probably the best ones on the market and, if you have a dual or quad LNB, you can get one with multiple tuners to allow you to record up to 3 programmes simultaniously while watching a fourth.
Difference between Freesat and Freeview is 2 extra channels on Freesat and a better quality picture on Freesat.
