Samsung NX1 owner questions

[philip page]

Hello.

I own a Samsung NX1 since march 2015. I do both photography and film making. Want to jump to full frame photograhy.

Right now I own NX1, NX16-50S, NX85mm, Sigma 35mm Art (nikon) w/ adapters. Considering getting A7r2 but first building a Sigma Art Series lens bag starting with the new 85mm then the 50mm.

Then I saw NXL speedbooster (need opinions!!) If I buy that. I still may consider selling my NX Lenses (dont mind manual focusing) and just keeping camera body longer.

1. What is best NX hack for higher bitrates? How does it handle deep grading?

2. Which would you rather have NX1 w/NXL speedbooster or A7Rii w/Nikon/Canon adapter

3. Looking to get Art series bag. What other lens options? (85mm art vs Mitakon 85)

4. B camera options ?

5. Which cameras matches better with REDs or 5d w/ML Raw.