Dear All Sifus,I currently drive a E46 330i and love the car.But I am always thinking about more power. I would like to upgrade to a used 335i either E90 or E92 body.Would appreciate any advice from current owners of such cars.My main concerns (as read from BMW magazines and bmwblog about the problems with the twin turbo cars) are:-i) run flatsii) high pressure fuel pumpiii) turbo flash gates???Let me know if there are other issues which I should look at.Thanks in advance.