I like this sort of thing from Hobbs:
Vivienne Shower Resistant Trench Coat - not keen on the gold top button or the lining (though I probably wouldn't wear the collar up).
The price is about right - less than £200.
I'm 5'8" and slim.
I have a thick winter coat, so it's for Autumn and Spring. Shower resistant is needed because if it's just cold rather than rainy I tend to layer up with woollens.
Thanks