The Inverness obviously wins on coolness points!
The "standard cut" overcoat is actually a three-quarter length. If you can find a real full-length one, IMHO it looks a bit better and helps keep the knees warm! There are some bargains to be found in spring and summer...
Here are my two favorites for winter wear. 1. a long military greatcoat (more discussion here

2. a plain cape or boat cloak:

Do an Xmarks search for cape or cloak, too...
Ken Sallenger - apprentice kiltmaker, journeyman curmudgeon,
gainfully unemployed systems programmer
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