I am a HUGE fan of Hermes coats. Have three, bought on sale , of course. (I love the "hunt". All very different - 1 floor lenth cashmere, 1 silk with a bold japanese kite print and 1 , well... take a look (not the best photos):
If the style and cut suits your shape, I say go for it. I always break the bank on coats and haven't regretted it. I find Hermes and Chanel comparable in cut and quality, they are just fabulously luxurious.