I have a couple of friends that did similar set ups, and liked them.

I had a 40 amper on my Katana 35 ES from Accel, and hated the thing. Spool up was drastically slower than the same set up on a CC P-25. Flying indoors this winter, I crashed the plane, as I simply could not control the plane with the motor spooling up WAY behind other stick commands. It takes all 4 channels in coordination to flya good size plane in a confined space. With the CC, I had no problem keeping the plane flying in the gym.

A friend of mine also had a small scale twin military plane (C-160, I think) that crashed due to an E-Flite 40 amp ESC that failed.

The E-Flite only has brake settings accessible to the user. I like the hard start too, and think that was the difference in the CC performing well, and the E-Flite not.

Again, the 20 seemed to do well. Those guys flew them in Shocky sized planes and up to 16 ouncers. Your set up looks OK, just be warned about the spool up, if you fly in a confined space.