So i can fly the msr pretty good. Should i go to the 120sr or just go to the nano or mcpx2. I guess what i am asking is does the 120sr fly the same as the msr just on a bigger scale?

FWIW, I went from mall toys straight to mcpx, and I love it. Don't know about the nano.  The nano is supposed to be hotter than the mcpx. Def. smaller. The throttle setup on the mcpx took some getting used to. If you chop the throttle (which was what I was used to doing), it slams into the ground because the rotors go into negative pitch. Stay low when learning, and ease off throttle at the first sign of trouble.
Best,
GB

If you have a programable transmitter you can easily adjust it to fly more tamely. and avoid the negative pitch issue.