New GRE for retake?

[Clay Made]

I've decided to retake the GRE. Although, I have good scores (Q740, V700), that got me into Harris and USC, I feel I can do better and with more of a window this time, it would be beneficial for scholarships.

Obviously, the new GRE is out. I have had a brief look at it and for the most part it looks good. My question was for someone who has done the whole studying thing for the old GRE, and is reasonably well versed, how long do you reckon I need to spend? I know this is subjective but still, any insights from someone who has done the new test would be great.