its quite the unit already and Simon may be along to comment having recently owned / sold one.
my 2p - new brake pads - EBC red or yellow
these mods are all for the driver that is a little more spirited / track orientated
research a remap to ensure fuelling etc all correct to avoid any high rev miss-haps, also I dont know if it is a drive by wire throttle but if it is you could be looking at flat foot shifting, launch control and down shift blips ;)
uprated coolant pump
uprated oil pump and sump baffle