Many congrats & welcome to the party (!)

Does your car still have the original metric Michelins on it? If it does I
think they are pretty difficult to come by now. Our good friends at QV do
some replacement wheels which will take 225x50s on the rear & 205x55s on the
front (as per what's on the 328). Paulo will be able to step in & tell you
the improvement that these make (in terms of grip) on the originals.....From
what I have been told the old Michi's went very hard very quickly with a
consequent lack of grip!

As for where to get the job done, suggest you talk to your local Servicing
agent & get them to recommend a tyre shop that knows what its doing.

I.

Good man!

All I can do is warn of the consequences of not doing the job properly -
my 308 had suffered (under prior ownership, I hasten to add)
from damaged sills resulting from a garage jack (the huge hydraulic things
with arms that reach under the vehicle from both sides) being used without
sufficient spacers/risers to allow the arms of the device to clear the
sills.
This left the car with two minor, but noticable dents at the bottom of both
sills, just forward of the rear wheels.  What I didn't realise was that the
base of the sills had actually split, so everytime the car was used in the
wet, water
was getting splashed up into the sills, where it would then sit, presumably
for
several days. This is what lead to the huge rust problem I had :-(

Paul