Craic lads, currently have a 318is and I'm tempted to upgrade to a 323i. Reason being I need some 6cyl growl in my life and the 323i are easy enough to insure as standard. Then obviously do a few bits to bring it closer to 325i power. Am I mad to pay the extra tax or are they worth it? I've driven a 325 before and loved the torque and power delivery, makes the IS seem a bit gutless. Not too worried about mpg as the IS only gets between 29-32 and I don't do big milage. Anything engine wise to look out for? Or any other advice?

Thanks in advance, Barry