Welcome to the forum Rogerz, you must love your hairdryers!
If you are planning to go to all the days, General admission is good rather than being stuck in the same spot in a grandstand for 3 days. With the general admission, you can find the best spots. My good viewing point is turn 15; you see the two last bends before the pits and any support racing cars coming out of the rear of the pits, you see them first! and there's always the spectacular accidents there too!