wow thats for all the replies!
lots of advice to follow, budget wise, im not loaded but I can put a few extra pennies on top of the money from the sigma sale as not many events on till march (that I can attend)
Unfortunately I have to stay behind safety fences etc, as its just a hobbie for me that I love doing!!
I was considering a new body, I had a 30D last year, but sold it (due to losing my job) and then thought the 1000D would be better (Starting to wonder if I was right to think this).
Maybe It would be worth me considering selling my Canon 1000D 18-55IS kit and my Canon G9 to fund a 40D body.
Lens wise, I think in budget the 70-200F4L is in budget, and maybe add the 300F4 prime to the bag for the extra length (quite like the idea of a prime for motorsport, only ever used zooms) might make me a little more creative with my shots!!
As for rockingham I only went once last year and it was a last minute thing with a compact (BTCC even in sep) and loved the venue, but because I didnt have my kit with me i didnt get a feel for focal legths, so heading back to watch BTCC end of april, and possibly british GTs later in the year!
As for Santa pod, I love it there, and its only about two hours from where i live so easily day tripable! I found stand side 70mm on my 30D was almost too long for what I was trying to do, but bank side, I think i was shooting around 150-200 (off the top of my head) depending on how far I went down the track.
Snetterton isnt that bad at all for shorter lengths as you can get quite close on the straights and most corners plus EVERYWHERE is accesible as its a basic venue lol!
And as for silverstone I have no idea, as im yet to toventure there as a venue, but hoping to hit the moto GP this year!
Also brands hatch possibly for the DTMs but not sure yet!!
and now im rambling so im going to stop now! thanks for all the replies though, certainly gives me something to think about
how would Canon 40D, 70-200F4L and Canon 300F4 serve me do you think?
I do have the luxury that on special occasions (no chance of rain) i can borrow my fathers 70-200F2.8L too, but if i break it i buy it lol so im a little scared of that one!!