kyosho for newbies?
The Nexus is a excellent trainer helicopter. Then later on, you can add a scale body on it like the Bell 206 for entry level fun flying.
The Nexus however, is not a 3-D heli,,, no amount of up-grades will turn this trainer into a 3-D'er,,, you'll need a raptor V-2 for that.
As for the engine,,, the OS .32 SX is my preferred choice,,, the most realiable engine I've ever used
Willi