fooldall

While I really like the stock smooth ride of my 92 SC400, i'd really like to put some 18 inch wheels and nice tires on there.. So my questions to you guys are these:

1. Do the 18 inch wheels and tires create any rubbing in the fenderwell during hard turns?
2. Does the larger wheel create any damage to the stock suspension or wheel hardware?
3. Will the larger wheels affect the nice, smooth stock feeling of the car?

I suppose i'm just concerned with a perfect balance of performance and comfort.. I don't want to destroy the luxury soul of the car, you know? Probably sounds stupid but...

Thanks all!