I would recommend the GH4. I got one in December and don't regret it.

The GH4 has great picture coming from it. If you saw some bad footage I guarantee it was a bad cameraman or editor.

The BMPCC needs so much to go with it that it will end up much more expensive. It has a great picture but having worked with one before it was a lot of hassle.

I only use two lenses myself with the 60D. The 18-55mm kit lens and the 50mm f/1.8. The 18-55 when lit properly is sharp enough. The 50mm is great.

There's a 40mm f/2.8 STM. It's a very good lens. Sharp and clear. I think you have it covered with the lenses you have.

Like Guy said, if the repair cost comes anywhere near the price of a second hand one, buy another one.

It was very good. The only thing I could really see that could be an issue, and it was a small one, was the part with the two guys. It was a bit shadowy and bland but that would just be a room change or repositioning.

The bag looks like a good idea too.

Nice videos.

The XF100 and 60D is a good combination of cameras. I wouldn't upgrade them anytime soon. I don't think the a7s would justify an upgrade unless you specifically need it for some reason.

I also recommend the GH4. It's in your price range and will future proof you to an extent. I use one myself and it's amazing.

>>Where a Panasonic GH3 or GH4 camera has unlimited clip length....

If you're from Portugal you'll have a 30 minute clip length shooting video as the EU regulations on tax for video cameras.