I'm using the "slog to cineon" from MacGregor, found here http://www.hingsberg.com/index.php/2014/05/sony-f3-resurrected-luts/ then apply the arri Alexa cLog to Rec709 lut in DaVinci Resolve with good results. I'm not very experience with color grading but for me it's producing pleasing results. Here's a quick upload of some random f3 footage that I applied the lut's too. I think I could have easily upped the contrast and saturation, but I was more interested in how it looked on my TV instead of the computer which seems to be much lower contrast.