Jonathan Maynard, who runs the Britishdebate ranking system for universities has released the top 100 speakers on the Irish & British debating circuit so far this year. There are some names on the list that have been around the circuit almost as long as I have...
To see the University Rankings click here. Cambridge are a long way clear of Oxford in second place with Middle Temple even further back in 3rd place.
To see the speaker rankings click here. Given the domination of Cambridge it isn't hugely surprising that Sam Block & Adam Bott occupy the top two positions.
As far as I know there isn't a prize for finishing top other than bragging rights.