As the majority say, go with the Sprint. It's the best flowing filter out there(some University just did a comprehensive test and the Sprint came out on top), plus, it's the filter that comes on the Superleggera and is a direct drop-in.
I got the Sprint filter as part of my Termignoni Carbon slip-on package and I installed the exhaust first and rode the bike for a week and a half with the stock filter, then I had the Sprint installed. HUGE, HUGE difference. I took my leaf blower and tested the stock vs. the Sprint, with my leaf blower stuck right up against the stock filter, I could hardly feel a thing, the Sprint flowed a freaking HURRICANE! That's my semi-scientific test, but it showed a massive difference in flow between the Sprint and stock.