17's are nice, but, they are so heavy when compared to oem setups, hence, not as good.
say, oem's ...
14's baskets weaves and tires weight 28 lbs
15" Euro weabes and ZIEX 225/50/15 tires come in at 32lbs
my 17" Focal F5 and 215/45/17 tires weight 42 lbs each. a bad upgrade.
I'm runing M3 springs and Bil stein shocks on my Zinno 325ic with 225/50/15's she handles great.
16's seem to be the perfect compromise for e30's.
here's my Delphi325iC on 16, 17 and 18's she's on H&R coilovers and can still drop another 1 1/2 inches
then Zinno on 15 euro weabes and m3 springs, perfect for everyday driving...
headlights pic is with Zinno on OEM springs and 15 weaves