So I'm in the market to get a native flash that I can use on either my E-P3 or E-PM5, for quite some time now I've only used a Sunpak 5000AF which was originally meant for a Canon AF (many years ago I had a Canon Digital Rebel 300D 6.3MP when they first came out, so I had the sunpak for a while), but works on the Olympus in Auto (non-ttl), manual and strobe mode, so whenever I use it, I'm either matching up the aperture (like you would in a thyristor mode, similar to my Vivitar 283) or setting it manually with the ratio set. The only other lighting I use besides that sunpak is a pair of photogenic powerlight 750 each with their own softbox which can either be triggered optically or by using a wireless trigger (ie: sits on hotshoe, and triggers a receiver connected to one of the strobes by pc sync cable). But also the little bitty popup flash that comes included with the E-M5 (which I never use, and won't work on the E-P3 anyways). But for on the go, it would be nice to get a fully compatible TTL flash unit, but not sure if I want to get the Olympus FL-50R, or save a little over $100 with the Metz, I'm assuming the biggest thing I would lose is the wireless triggering capability that olympus has between camera and olympus flash units (especially if I plan on getting a second flash unit for more compact travel kit, to setup multiple lights). Though the Metz seems to be more powerful, and has a faster recycle time. Edit: Just noticed the 'over 100' less bit is because it's on educational discount (Where as the olympus model doesn't have an educational discount @ B&H), otherwise it's a $50 difference,and from researching it looks like the Metz is fully compatible with Olympus's wireless system.