17s would look best without lowering it. I have 215/45/17 and that is what looks the best for filling up the Fender
gap. However, my steering wheel shakes somewhat and I was told it was from the 45 size tire (I dont really notice it anymore though). I also have wanli tires which are okay but if you had better tires im not sure if it would even shake. So if you want better looks get 215/45/17, but if you want to make sure there is no steering wheel shake at all get 215/40/17. Either way get hubcentric rings that are for your rims.