1.2's if you like Team Dynamics round the outside, or the 1.3's if you dont.
R888's are the best track tyre still and great on the road too.
Expect to do a set of front tyres every track day if you drive hard and go out all day. Just keep an eye on tyre pressures and tyre temps to make sure they dont kill themselves too fast. Rears last ages.
I can also supply dunlop slicks for track days too! Slicks will blow your mind.