I love my Audio Technica ath m40fs
Others have mentioned ATH D40, which seems to be the extra bass version. The M version is not short of bass, but you can never have too much bass.
I 'spose the choice is down to your use. Listening to bass heavy music for fun, get the extra bass. Engineering a mix, get the flat response.
+1 on B&H. Low prices, and trustworthy service.