Hey, Chas. not bad demos as far as they go. But the problem is, the real sound is a doppler effect. You gotta hear that sound being physically thrown around. I use real 145's and 147's on my house job with a B-3, but I use a Motion Sound top box and a Polytone bottom when I need something more portable. Don't even know if Motion Sound makes the unit I use (About 20 lbs-about 17"x9"x11", but those horns spin and it makes a difference (to me,Diki).
That being said, the Nord simulator is better than the XB-2, which is pretty nice.
Hope this helps!
Regards,
Russ