4 lug to 5 lug

[Veedub]

Im thinking of going with the addapters, reason being, if I want to ever go back to the stock size I can.Plus Im looking at the 5-112 pattern and under the 2006 Jetta, theres some nice wheels.Thing is, lets say the addapter is 1/2" thick, what ET rim would I want to look for?Would I want a 15x6.5 in a 40-55et or a 30-40mm et?

http://www.tirerack.com/wheels/Wheel...6&autoModClar=