And for a good explanation, visite : http://kgm.tiwing.com/calcs/offsetcalc.htm
I tried 3 types of wheels
Original wheels :
Ugly, not flush, with really cheap 205-55-16 tires
I've never driven with these wheels.
The day I took possession of the car, I installed my winter tires on 4 news wheels. 4x RSSW (cheap) 16"x6.5 offset 45mm with 205-55-16
That's clean, look OEM and almost flush (more than originals wheels). But it's only for winter.
Last summer wheels.
Rota ATTACK 17x7 offset 48 with 4 Hankook 215-45-17
Did not like the color, not flush and tires were little bit too thin.
Thanks to Google Street View
Sold it few months ago and bought 4x Rota Torque 17x8 offset 48 with 225-45 Continental DW. No pictures yet on the car, because the weather is like that every week
1 month to wait