My mate has one with the 230+ kit. Rapid little thing. Usual sort of mods as mentioned above:

Induction, Exhaust, Sports Cat, Intercooler, Reduced Supercharger Pulley, GTT remap or similar, change of spark plugs, headwork/cams for the lairier packages and uprated injectors and throttle body. Things tend to get on their limit though when you pushing 260+ think its the inlet side my mate was saying if I'm not mistaken. With about 230-240 though they are quick enough.