I have a 2.2 JTS BLK Brera. The car itself looks awesome

( I personally believe it looks better than Bimmer 3 series and M-Benz C class)
I picked up my car two weeks ago, very happy so far~ I think the handling is even better than my BMW 330ci
I know it is a 4 cylinder car, might not worth to spend $$ to modify it... but I still want to do it since the 159 GTA hasn't out yet.
Can anyone suggest me where I need to start with??
Thanks in advance
-Eric