I use only JR-so -- what I like are simply ones rated for about 100-150 in oz on 6v. Iuse a low impedance NIMH 6 v pack for th servos and a tiny 950 ma low impedance pack for the engine- look in Cheap Battery Packs .com for good ones.
as hard to accept as it may sound -- the cheap 125 Sport JR's work great on this size plane (140 on 6v)
I first used 9411- less power faster rating - but all in all not as bullet proof as the 125 sport. I busted a gear on the 9411 on a hard Harrier landing
I swapped all of this into my Funtana and so far - nary a problem
one servo for rudder - one each aileron and really you can use less power on the elevators -
any comparable servos should do all you want.