You're in luck... as it happens, I know a lot about mirrorless cameras because my older brother is a photojournalist with work that is frequently featured in National Geographic Traveler and, occasionally, NatGeo itself, and because where he lives, professional photographers on the cutting edge are few and far between... this means every time I call him or visit him, we talk about cameras for about two hours.
Or more.
He made the switch to mirrorless about a year ago with this camera - the Sony a6000
http://www.amazon.com/Sony-Mirrorless-Digital-Camera-16-50mm/dp/B00I8BICB2/ - and then switched up to Sony's higher end mirrorless offering this year, the A7R II, which is a 42.4 MP camera (a6000 is 24.2 MP, but unlike the $3000 A7R II, it can be had for $628 with an 18-55 lens).
He calls the a6000 probably the best mirrorless camera on the market under $1000. His photos and statements have been used by reviewers. He has done joint photo shoots with really big names in the industry like Zack Arias, and he was even the reason that Zack started using some mirrorless cameras.
So, I told you all this, to tell you... he knows WTF he's talking about. My brother is very open-minded and soft-spoken - literally the opposite of me. I'm very direct, sometimes harsh, and I have no problem clearly saying something sucks or does not suck.
But he has made it very clear to me over many, many phone calls that always devolve into the latest discussion of what new lenses, lighting equipment, new Sony firmware updates, etc., that Sony is ahead of everyone in the mirrorless market right now.
I would spend the extra $130 and get another 8 MP worth of image data, along with some of the best video recording in its class ($400 - $800 range).