Done a few things already...
17" SIII wheels, custom paint job, Toyo sport tyres
Painted part of the rear bumper black
Hyundai "knife" badges over the side indicators
Debadged then rebadged rear as "Elantra"
Pipercross panel filter
Stands out a bit more than a normal i30 without being too over the top I hope. The new wheels/tyres made the handling even better, too! Quite tempted to go for a tuning chip and exhaust, but I'll let her settle in for a few miles first methinks.
Also just filled up for the first time and managed 51.8mpg which was, surprisingly, pretty much what the trip computer was saying