The Extra Easy is not a bad choice....

You'll find the glow powered plane flies MUCH faster than your electric. Everything happens faster and the damage of a crash can be much more extensive. Repairs are either really cheap... or very expensive with no real middle ground.

The glow engine is a device you must respect as if you were working with a circular saw that has no guards. The prop is spnning at over 2000 rpm at idle... in the vicinity of 12,000 rpm at full throttle. (some glow engine props spin at OVER 25,000 rpm!) evn a wood en prop at this speed can take a finger off instantly, or mangle you hand... or put huge gouges in your leg. Learning to safely operate the engine really requires assistance from an experienced modeler...

While getting used to operating the glow engine, tie the plane down so it CAN'T get loose. They pull harder than you might expect.

The glow powered plane will probably need 3 to 10 times the room your electric model required. When its travelling with the wind... it gets WAY out there to where its impossible to see which way its headed QUICKLY.

The little electrics like the Firebird are what I call 'Toy Class" models. They essentially fly themselves and are hard to damage... hard to do damage with. The large glow model can KILL or MAIM someone. You will have a plane capable of doing $1,000,000 damage... EASILLY.