This stuff is covered in my FAQ sticky.... "What looks good" is subjective. Now matter how many opinions you have thrown at your, in the end, it's your car.
The benefit of coilovers over lowering springs is yes, height adjustability. If you're not satisfied, you can change it. But you should get an alignment every time you change your height. Because you're toying with your camber/toe/caster settings whenever you raise/lower the car.
I personally think 16" wheels look the best on 6th gen's.