I use the 20amp Rated MPI regulators and have had no problems. I mainly fly 3D and they have been just fine. I dont like the 10amp rated ones as I have burned out one of those. I would use at least two for safety.

There are 8 hi torque digital servos in my 33% 260 and one smaller 5245 on the throttle for a total of 9 servos.

Smart Fly has a nifty regulator I might try soon. Its even got a little fan on it. I use the Smart Fly ignition kill switch and it works great.