yeah, I love Gr C/GTP cars also, some of my photos are on their website and my page with videos here :
http://www.gurneyflap.com/09spagrc.html
I'm thinking about Monza, only for 1 day, I don't expect much more cars than at Spa but hope to be wrong, there was a Sauber C11 running in private tests at Donington some days ago, would be a nice addition to the field.