I have started to rock a Surefire E1B and a Streamlite Microstream for work. The E1B is very pocket friendly absent the aggressive knurling and with the addition of a bezel down clip. It is quite comfortable to carry in flap pocket type work shirt. I always used to carry single cell Surefires in belt pouches due to the knurling and the crappy bezel up clips. This gives me back some belt realestate , anmakes fora more comfortable day for this middle aged tradesman. The two stage output works well for me ,can't see a need for more brightness. Build quality isvery nice , with the usual bulletproof Surefire engineering.
The microstream is a backup/penlight. I learned a long time ago to always carry more than one lite. In an atic of a crawlspace lite can equal life.
All in all , seems like a tight little package!
Beware of other makers output claims ,many inflate lumens and measure at the emitter rather than what comes out the lenses.
Chris