A few double-breasted examples from the Japanese RTW brand Ring Jacket. The Armoury, a new store in Hong Kong, has a nice profile of Ring in English.
This 4×2 DB I like:
Below is a single breasted jacket. I suppose the case can be made that SBs can take boldly shaped peaks. Even so, I’m not so keen on the exaggerated sweep, angle and height of the peak lapel:
Having said that, I know there are fellows who can make this look work.
Additional links
– Styleforum thread on Armoury opening (including visits by Ring Jacket and Drakes of London)
– Styleforum thread on DB jackets
That second jacket isn't a DB – it's a SB peak.
Thanks for the catch. Fixed temporarily at least.