I have the Puma golf rainjacket. It's the first I've ever found that fits correctly. I'm 6'3", 160 lbs, so most jackets that are 'big' enough swallow me whole--and I can't swing with all that excess fabric. It's nicely fitted through the body and is made of a stretchy fabric.
It has the zip off sleeves, but rather than leave a big oversize short sleeve, it leaves sleeves like a polo (shorte and more tight fitting sleeves than "short sleeve" jackets that I've always found are elbow length and huge).
http://www.zappos.com/n/p/p/7560331/c/3.htmlOgilvy wore one like it in the Sony this year--that's the first time I ever saw it...and I knew I had to have it!
As far as sizing goes, I wear a medium in Adidas Climacool and Puma golf shirts...bought the jacket in a large and it is still VERY fitting...not big at all.