haha yes. Seriously just buy whatever your favourite bike shop carries for brands. The Giant and Argon are going to be the 2 most common bikes at the track, I know this because they are the 2 most common bikes at London already. Specialized, Fuji and Felt TK3 make up the rest.

They are all the bloody same. Aluminum frame, box wheels, road bars. Really doesn't matter which one you buy, its the cheapest bike you will own and it will last the longest.