the engines you mentioned use glow fuel (10%-15% nitro) is fine for sport flying
more nitro increases engine power within reason 5%-15% is considered normal for sport flying buying 20%-30% is a waste of money at this stage of the game


Each package comes with a radio the Alpha uses JR, the tower packages can use Futaba or tower brand (futaba OEM for tower I believe).

All major brand are comparable.. (JR,Futaba,Hitec,Airtronics)

The important thing is to find out what radio brands your club supports for buddy boxing