Is there ANY chance for us mortals to acguire this package as only 30 pieces will be produced?

Mono X300 do not use PSXR power supplies.

I think the 300 rating is a little confusing, but not neccesarily intended to be dishonest. Most amps are rated with a headline figure at 8 ohms, although some use the output at 4 ohms. Cyrus have chosen to rate theirs somewhere imbetween. I can see the argument that this is where most speakers lie in their average rating, but even so it's kinda confusing when making comparisons.