Rotor and Ego would be fine. Ego's fit any hopper as do most markers. Rotors are great on batteries as well and are pretty bulletproof.
Personally I use a Spire because of the higher capacity and the fact it feeds re-balls flawlessly. However any hopper should do you so long as it feeds 15bps.
I have shot ego 07's using rotors and currently use a rotor with my 11. Never had any issues with them, a lot of people use this combination and never heard of issues, hope this helps