Jacket needed... waterproof and very breathable

Just took delivery of my "around town" waterproof jacket.

http://www.wiggle.co.uk/p/cycle/7/dhb_Southsea_Waterproof_Cycling_Jacket/5360043768/

£48 not to bad and the fit is nice. It looks like a normal jacket. It's not going to be overly breathable but does look very waterproof. I'd say good for cruising around in the wet, but not hard riding. I guess I'll find out in a few days how it performs.

Now that looks like what i'm after. I want something for my short commute/leisure rides in winter. anyone else tried one? Any sizeing issues I'm a 38" chest and about to order a medium.EDIT: done. got a feeling from the size chart and comments it might come up a tad big but better that than my fatty-back poking out of a small.