I tried a pair of tights without a chamois over my shorts and found it just too bulky feeling. I have since switched to leg warmers with my shorts. That seems to work pretty well and gives me the flexibility to remove them if it warms up. They fit into jersey pockets so I can put them on for long downhills too. I hate to be cold.

For arm warmers I cut the toes out of a pair of wool hiking socks. They worked great as well and were cheap.

Veronica