I have 14" brakes off the front end of the gen 3 & 4 vipers. 4-piston brembos and 14" rotors. Brakes feel great, stops NOW and inspires confidence in your ability to stop short when needed. Pedal modulation to avoid lock-up is easy. Snd despite efforts to heat them up with repeated hard stops, I've not experienced brake fade yet.

Wheel size, I doubt you could fit 17" wheels over these, never tried myself though. 18" is probably the safe minimum diameter.

I wouldn't go bigger than 14" rotors unless I bought super expensive aluminum hubs with bolt on rotor surface area to reduce weight. These stock viper rotors weigh around 30lbs each.