As Farnborough is effectively a 'sales exhibition' you'd expect there to be many in-production types to showcase products, like the A400, F22, F18 and so on.
The only things I'm looking forward to are the Su-27 and F/A18. The other loud stuff is just the standard guff you see at most other airshows, along with the Eurofighter flying around in a figure of 8 for 5 minutes, tornado role demo, red arrows, BoB memorial flight, all run of the mill boring stuff really.
RIAT will be miles better looking at the fly list. MiG29, F-16s, Rafales, Gripen, A400, F18, even a DHL 767, F-5s, A330 Voyager, C17, VC10, all flying. Pity the Frecce Tricolori won't be there, they were awesome.