Tire and Wheel fitment Q&A

[tangsuto]

I had a question about the tires and wheels combinations. From this thread I can see that there are a lot of different combos that people are running. However, I wanted to know about the pros and cons of having different types and sizes of wheels and tires.

I am asking because I am going to invest in some new wheels and tires. I'm not rich or anything, but I do believe in getting quality especially for my car.

I live in New England which can have some crappy weather like a lot of snow and rain and more often than not crappy roads ridden with pot holes. I currently am running the toyota supra stock 16, 5 spoke star wheels on 225-60's all around.

1. I can't decide on whether to go with 17's all around or 18's all around.
2. I want a sportier look with thicker wheels and tires on the back and also possibly thickening the front.

As of right now I am looking at 17's all around with 235's on the front and 255's on the front. I wanted to know if this was a good idea and what width wheels to go with. Will the wheels fit with the car and look good? Will the 17's be able to take a little more road abuse compared with the 18's?

The car is also my daily driver so it has to be able to drive all weather. All input and help is greatly appreciated.