I've got the path jacket and even though fit is great, it's proper boil in the bag. It's better than no jacket if it's pissing down, and very good at keeping the chill out with a base layer or so underneath, but I'm always soaked from sweat in it after a ride.
I doubt this is the ultimate but the medium fit is perfect on me.
Use it all year round with a merino base layer when it gets cold.
http://www.goreapparel.co.uk/gore-bike-wear-path-jacket/JGPATH,default,pd.html?dwvar_JGPATH_color=3500&start=6&cgid=gbw-men-geartype-jackets