If grip is your primary concern then you will want an "r-compound" tyre. The conventional recommendation would be Michelin Pilot Cup Sports (which are good but not the best). If the sizes work for you, try Dunlop D01Js - I am currently using these and they are the stiffest, stickest road legal tyre I have used. Otherwise, Avon make a ZZR tyre (not to be confused with ZZ1s or ZZ3s), that looks the business. A cheap option is the Colway Traxtar - its a retread on usually Yokohama carcasses with Michelin Pilot SX tread pattern and soft dual compound rubber, all for about £40 per corner.
There are other R-compounds from Toyo, Yokohama, Kumho, Pirelli, Hoosier but either sizes or limited availability make them more difficult options.
The only downside for R-compound tyres is they wear out faster on the road - maybe 5000 miles max life on the rears - but that is the price you pay for soft sticky rubber.
If you actually want road tyres (and are not concerned about ultimate grip) then that is a whole other kettle of fish...
Richard