Every distro offsets my monitor differently so the modelines are different for every distro I try. This means I have to use xvidtune alot. Problem is I haven't had much luck using xvidtune after proprietary drivers are installed. It usually works out pretty good when I set my monitor up first in using the nv driver that way I don't have to move around to much when I do load the Nvidia's driver with ENVY.
However, the Xorg should be reading my modelines with the nv and its not. Like to keep my system as bug free as possible after all I was planning on using Linux Mint as my every day linux machine