I have tried a couple setups. My go to setup has become Futaba BLS servos on straight 2s lipo. I have my N7, E7se, and E7se Speed Machine setup this way.
On my N5c, I have a 6v setup running Futaba BLS252 Cyclics, BLS251 Rudder, and BLS135 on the Throttle. I run a Scott Grey Reactor X2 Regulator feeding 5.6v to the tail, and 6v to the Cyclic and Throttle.
I know there are guys with all HV setups on their N5c, but I can't think of the Futaba HV mini servo number right off. I am sure others will chime in.
Again, welcome to the Synergy family.