Hi, I'm considewring the purchase of a Gore Alp-x jacket mostly for rainy days and have seen several different sizing charts on different places (websites from Gore, Nashbar, Performance, etc.). I'm 5 feet 7 inches, 175 pounds, with a chest size of roughly 40 inches. If I go by, lets say, Nasbar sizing I'm a large (41), on Performance I'm a medium, on Gore website I'm a XL.

This is the jacket



This is the chart for Gore Bike Wear Website:




This is the sizing chart from Performance Bike


I have read the jacket is a slim fit and that some people suggest bigger size than what the sizing chart shows, but what chart should I trust?

Thanks,

Francisco