Not really into kayaking myself, I was into Piragüismo "Spanish" when I was younger, which are very fast, long and very narrow closed cockpit kayaks.
If you want to do river trips down around this area then let me know. There's a company operating at our pool called seahawk kayaking and they do trips in christchurch and in keyhaven. They charge £35pp for the christchurch and £25pp for the keyhaven trips.