i find anything windbreakerish makes me too hot once i get going.

if it is above freezing i usually just go with a polyester undershirt (bike jersey or whatever really) and a wool sweater on top (varying thicknesses for varyious temps.

the wool is great in that it is warm but still lets lots of air through so that when i start sweating i dry prety well.

that said i am generally a really warm person so if you get cold easily ignore all my advice...