I've just redone mine without the k and n and with normal unleaded instead of super/optimax and got 9.7sec which I will add to the table.
Incidently I once did a 8.4sec with chip, k and n and Optimax, on a red hot bit of road in the middle of last summer. Perfect traction getting away.
I'm currently running a test at the moment, with Tescos 99 ron fuel because I happen to live near one of the few test garages selling the stuff.
BTW. Since running the car without the K and N, which I've sold, the fuel consumption has gone from 25mpg to 27-30mpg. The last tank on 95ron unleaded and a normal airfilter returned 30.5mpg which is excellent. My best on the post K and N test was 33.3mpg!
Edit: once Ive done a couple of tank fulls of Tescos 99ron fuel, I'll report the mpg and performance figures.