I have a Pinnacle 3010ix (£17.99 from Play.com) but would not recommend it at all. The software that comes with it is not worth loading and the quality of the picture capture from the SKY+ is atrocious. The sound very often goes out of sink with the video which then starts to drops frames. Tried almost every third party software (downloaded as a free trial) that I could find and all have been disappointing. The only one that seems to work is Blaze Media Pro. But again the quality of the capture from SKY+ is quite poor.
Also, the card does require a very good strong signal to tune any freeview channel. With my current arial my TV picks up all the freeview channels and displays a very good picture. With the same arial fed into the card I pick up one or two channels that then freeze and are really unwatchable.
Now I would really buy a DVD recorder and archive onto this from the SKY+ box if only I had room under the TV and the wife would let me
(my next project is to get a satellite card and see if I can have play with freesat on my HTPC - although I am not hopeful - you hear a lot peolple on this forum say "Ah I did x and y and it all works a treat..." but personally as far as a HTPC is concerned I have yet to experience that).