It's not a race, luckily!
Do you have details of prices and times for the various options? When will you be there? We'll be based in Hayle from 3-11 October, so I was only looking at a day trip myself. Cheap is good.
Never been on a chopper personally. I did ask at St Just earlier this year about a siteseeing trip, but the pleasure trips only go over the coast and I wanted to go overland to look at the circles...