I have a 40mm on 14's. Was just subtle enough to improve the looks without compromising ride on my harsh local rides.
You will need to go at least 60mm drop IMO if you really want to make it
look lowered for style purposes, people who don't know golfs just seem to think it's the standard height.
Handling improvement will depend on the springs you buy. Eibach are the peoples favorite but i have the opposite - GMAX 2nd hand. Not stiff enough for my tastes and little to no handling improvement but for £40 and 2 years use so far i can't complain!
