I take your argument about 18" rims being fine.... and yes, using that argument I could probably get away with it - if I could convince my colleagues they came with both 15" AND 17" as standard
When I got the car, it had been lowered quite drastically AND the previous owner had put 21" CHROME rims on *shakes head* really some people. Poor car !!
Pelican do Nology Hotwires for the 328 as well - they do the whole 3 series range for E36. Car has just been serviced, so I only replaced the leads to start with - I will look at new plugs in a few months. I want to run with these for a while and make sure there's no adverse effects, like poor cold starting or anything.