Hans,

Monday 29th August
Morning Newcomers Race 10:15am start
Afternoon Senior Classic Race (500cc) 13:15pm start

Wednesday 31st August
Morning Junior/Ltwt Classic race (250/350cc)10:15am start
Afternoon Junior Race (600cc) 13:15 pm start

Friday 2nd September
Morning Ltwt/Ultra Ltwt Race (250, 125/400)10:15am start
Afternoon Senior Race (up to 750 4cyl, up to 1000cc anything else) 13:15pm start

Which is the best really depends on what you like best.

Dont forget, if youre flying over youll have to allow time to get from the airport to where you want to be.