I have both the 2012 and 2013 Houdini in medium. I am 5'11 190#. In Patagonia and other well-tailored brands I wear a medium, but I wear a large on other simpler patterned clothes.
The old 2012 Houdini in Medium fits great with a R1. A light synthetic puff vest fits underneath as well, but snugly. The new 2013 Houdini in Medium fits great with a t-shirt. Definitely will not fit an R1 as it is snug across my chest. Large fits decently, and I'd guess would layer fine with a 200wt fleece, depending on the cut of the fleece.