This probably sounds like an odd question, but are the OMD cameras reliable in firing external flashes using triggers? I ask this as my current ep3 was a disaster with my Elinchrom trigger - would rarely fire at all. I'd like to be able to have a smaller camera usable in my little mobile studio set up (Lastolite hilite, 4x elinchrom D-lites) alongside my D700, as well as out in all weathers at football matches with my son. The em1 with the grip and lens cash back is looking a tempting offer at the moment (I got my D700 when there was a free grip offer quite a few years ago!).