What is magical about beam weapons and fusion engines?
The fact that beam cannons technically would be invisible.
*Photon* beam cannons. But then again, we already have subluminal lasers...
As for fusion engines, there's no such thing. Fusion is for power and blowing stuff up, not propulsion. It might be a souped up ion drive using a fusion reactor to power the thing, but there is no such thing as a fusion engine. And BTW we have yet to invent a sustained (i.e. not an H-bomb) fusion reactor that produces more power than is put into it... I'm not saying it's impossible, but it's going to be well into the future before we have fusion-powered fighters, if we ever do.