Not sure how much flying experience you have or how much of a "power hog" your looking for, but for raw power I'd consider a OS 55ax.. It fits in the same space as a .46 and has gobs of power... If you want that great 4 stroke sound then by all means consider the Magnum XL 70 RFS 4 stroker as the OS 70 FS II 4 stroker has been discontinued.. This is a much better engine than the new OS 70RC..

As for a radio I'd go with the Futaba FASS either 7C or 6exs..

Servos.. Your choice, but I'd consider the Futaba s3010 High torque for everything but the throttle.. there you could use a 3004

Rich