[Michael Gissing] "Oliver, what codec & frame size?"
Typically I'm working in some flavor of ProRes at 1920x1080 at 23.98fps. I think the example I mentioned was 25fps and ProResLT.
[Michael Gissing] "Adding a second powerful but cheap NVIDIA GPU to a Win Resolve setup will surely pay for itself if working with challenging footage like R3D etc."
True, but it can cause other issues if this workstation is being used for more than just DaVinci. Not sure on Win machines, as my work is all on Macs. BTW - I never work natively in R3D. I feel it's a very inefficient approach for anything except down and dirty short-form jobs. I convert to ProRes using Redcine-X Pro first. Resolve Lite will take larger frames than HD, but the max output is 1920x1080.
Here's a review I did last year when R8 was released, with some performance tests that I did at the time:
http://digitalfilms.wordpress.com/2012/01/20/davinci-resolve-8/
- Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com 
