Anytime someone presents a long list of "must haves" everyone tends to leave the building.

Because that much data can not be found in one or two locations.
Some of it is may not be available at all.

I am going to approach it from a different angle.
Even then, it is not a solid answer.

1. By the fact you want a camera with Electronic View finder, you have eliminated all DSLR cameras.
A true DSLR will have Thru-the-lens optical viewfinder.

2. Battery life of 500 or over hours requires a large battery. A large battery requires a large body.
So, you have eliminated all small cameras.

That just leaves the family of so-called mirror-less cameras.

Here is a comparison of such cameras:

http://www.dpreview.com/articles/8986630048/mirrorless-roundup-2011

The Panasonic GH2 seems to have what you want.
But some items can not be verified.

It does gives you a starting place.

Good Luck.

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