To my way of thinking, if I were you, I would change it with the enough money. Nowadays, I have found some information on the internet, no matter its function or its style, it has advantages over the E90 328xi. So, I support to change,but the most important thing is that you need to have enough money!
just like me, many time I play a
game, i met a problem and I can't find the solution. But I never give up the game because I thought that I will find it at last.