Looking to purchase some 19x8.5" +35 offset wheels for my 2016 ILX Premium. The guy at the wheel shop is recommending 245/30/19 tires but I'm worried about it riding like crap. I want the car to look nice but also plan on it being my road warrior between northern and southern California.

Couple questions:

1) Any recommendation on tires for the 19" wheels? Whats the thickest wheel I can use without looking like a 4x4?
2) If I lower the car a couple inches, what does that do to my factory warranty?

I'm also considering backing down to an 18x8.5 in order to get more rubber.

Thanks!