I ordered FanVision (I’ve had it at Korea last year and Singapore in 2009 – when it was Kangeroo TV) as it was very useful, especially for the timing screen.
Main reason I wanted a radio station was for before/after the race when things are still being discussed, Silverstone FM really set the mood with pre/post race interviews for all the support races too and just an entertaining weekend etc.. before, so brought that sort of TV build up whilst you were still at camp getting ready! That said, Singapore and Silverstone both had build up, interviews etc… on the big screens so maybe Spa will have this too? The Singapore big screen coverage was really good, though does help when you’re slap bang in the middle of a big city.
Anyway, I’m sure there will be plenty to keep us entertained with before and after the races :)