Recommendation for an outer shell

[jberryhill]

I got back into cycling last year after a 30 odd year break, and with this mild winter, I figured why stop.

The problem I'm having is that while I have top layers that are warm enough, I tend to perspire on the uphills and then freeze on the downhills. The wicking base layer is doing its thing, but there is still a lot of sudden evaporation.

I tried an impermeable rain jacket, but that just gets to be like a sauna in there. So I'm wearing a jacket from an old training suit, but the wind just goes right through it.

Is there a reasonably priced compromise between windproofing and breathability that you would recommend?