I also thought about going the Sony a6000 route but the more I read about it the more I am moving away from it. It certainly has a huge fan boy following but there is no where near the choice of lenses that the M4/3 system offers.
Will be interesting to see what the E-M1 mk2 offers or the Sony A7000 if and when they come out. But probably won't wait because there will always be the next model and it never ends.
I also gave the a6000 a hard look. I had the nex-5n when it came out & loved the body, hated the menu, kit lens & hated the small lens selection. The a6000 menu is actually very easy to understand, the video is great, the body feels good in the hand, etc. I was so anal in my a6000 research that I put every possible lens for the e mount into a spreadsheet, along with specs, prices, DXO scores & reviews from others. To sum up, I feel the lenses available are pretty poor. The zooms have crazy softness & only less than a handful of primes seem to be rated well-some of which cover the same focal length (multiple brands). Since it would be a vacation and ski camera for me, I can't live with primes. One can also put lenses from other mounts on it, minus any AF for the majority of them, but it defeats the goal of having a small camera.
I also had the e-m5 (mark I) for about 6 months prior to throwing in the towel and moving to the D600. Zuiko glass is simply great. I can say that I had to buy the grip for the e-m5 because I couldn't hold it otherwise, at least comfortably. I have the E-m1 at the top of my list at the moment, but I may just wait to snag one when the next updated model is released. No rush on my end. And I'll echo what Rick mentioned about the DR. Having owned 3 Olympus DSLR/mirrorless bodies, what killed me was the lack of DR. The newest mirrorless models use much improved sensors that do a fairly good job, but I still haven't been able to push the adjustments very much without getting a ton of noise, freaky looking mottled textures or blown highlights. Having shot purely in RAW for the past 13 years, I have always wanted something that would let me adjust to my heart's content. That only happened with the D600. But, the e-m1 (and the e-m5 II I would imagine) seems to be the best option in my case, mostly because of the entire system, not just the bodies. Best thing you can do is rent one and try it out one weekend. Or, get Rick to let you borrow one of his.
