I would also agree with just getting a bunch of custom goodies with the amp. Custom eq, xover, terminals, fuseblocks, distros, that sort of thing. Stuff that just makes the amp that more special. Anybody can make an amp, and then only release a few and called it "Limited Edition", but what makes it stand out to me is all the added goodies. Hell, even like throwing in some swag, hats, shirts, key rings, makes it just "seem" that much more special to me, even if it might not be.
I also like the idea of an "octane" style amp. 2 amps, a cap, and a cube, that's a real good combo. Just hookup your wires and you got everything you need in a nice package.
The One is a fantastic amp, but even if I wanted to install it, I don't got nothing I could push 9000+ watts to, so to me it just seems useless, even if I could and wanted to afford it. But if you were to release a 5 or a 7 channel amp, it's a lot more versatile and useful to the "average" person

Granted your "average" person isn't going to be buying an LE amp, but you get my point. A multi channel amp is not just for SPL numbers, like the One is.
Also, you can't just throw the One into your car and it will work. There has to be MASSIVE upgrades to your car just to power it, then you have to a wall of subs to utilize all that power! So that cost a lot more than if you had a multi channel amp. You could then just "throw" a multi channel amp into your setup and have a kickass LE amp in your car with very little upgrades needed.
Don't get me wrong, a LE amp is only meant for a limited number of people, hence the name, I am just saying a large multi channel amp will probably be on more peoples radar than a GINORMOUS 1 channel amp IMHO

That and people might be willing to pay $5000 for a sweet mutli channel amp that comes with it's own custom goodies, where as they might not want to pay that much for the One for instance.
A LE amp will always carry a hefty price tag, that's kinda the point of a LE amp. When you add all the custom stuff along with the amp, it just makes it way easier to justify spending that much money IMHO.
I just love the fact the PG actually makes a LE amp with every new model line. That's just soo cool. I love it!