Have had my 330 since August and enjoying it - nice upgrade to my previous E46 320ci M Sport
Have the runflat Bridgestone tyres off for winter, replaced with Vredestein Wintracs. What a difference. Toying with not putting the runflats back on in the spring. Tempted with new rims, prob 19", but that may just bring the harsh ride back - roads are pretty poor here (Romania), so may stick with the 18's with new summer tyres.
Would consider a suspension drop (slight) at the same time.
Also looking into a remap and exhaust
Going to spend a bit in the next few months, but will be worth it I'm sure...