Wheel/brake upgrade necessary?

Well, if you believe more bling = more speed then what are 20's worth? 10hp per wheel? Dat's almost as good as vtec yo!

Seriously, you don't need to improve the brakes because of different wheels unless you want to fill the space between the discs and the wheels.

Your stock brakes will work, but going to 20" will decrease your braking performance. It is wise to upgrade your front brakes to 13" or 14" .

Yes I beleive you should

not to be a dick about it, but simply put anytime you add weight anywhere in the car, you add to your stopping distance. Adding it to the the rotating mass is like multiplying the weight before you add it. One more thing to add in this equation is that your tires will weight less, so if you are figuring out your weight numbers, don't just compare one rim to another if your tires are changing side wall height like yours will.

Now for my $.02 you need to color the calipers and up the discs, otherwise it will look like an import wheel tire combo.