I recently bought used 328i, auto, prem package. I drove a 335i w prem and almost bought a 328i w sport package, manual trans (drove it for several days). My thoughts: forget the sport package unless you have lots of open road for high speed cornering etc. The standard suspension is very good & sporty enough for most of us - and the ride is noticeably better. 335i is overkill (and unreliable it seems) - the 328 is actually very fast. Also, 6-sp manual is a bit clunky and auto is very good (esp when shifted manually). Finally I do not have run- flats; got the M Mobility pump and sealer instead. Thought I had to have sport and manual, but am much happier with standard suspension and auto.
Smooth, powerful engine; very good (and sporty) handling, good ride; quality interior w lots of features, solid build; good gas mileage; car is right size (though has gotten a bit wider) - most other premium sport sedans seem to keep getting bigger, and bigger. Overall a most excellent automobile.
Should have in-dash CD changer and a place for small spare tire; needs a sport setting for transmission. Wheels are uninspired at best, ugly at worst and exterior styling could be better.