In my world it is always noted when a maker intentionally overbuilds to hide precious little inside -- and who then overcharges for the great "build quality" illusion.Then don't buy it! Is somebody in your world twisting your arm? Boy, glad I don't live in a 3rd world country.
I find it interesting that you do a Google search and find photos of the inside of the Bybee Stealth but you will never find a single photo of the inside of the Qx4 or the PowerCell.Who cares what's inside if it doesn't sound good. Do you know why you're buying the product?
IE: If Rum wants to power his toaster, he can buy a copper PC off Ebay for $5. Now why does he spend $750 for a HiDiamond copper P3 and $2100 for a copper P4 PC? If the answer is NOT for the sound, then he's wasting his $$.
I bet cost of raw material to build the one off Ebay is close to the P3 and P4 but HD is able to manufacturer a PC that sounds better. You can't judge the book by it's cover but in this case, it's the precious little insides when quality of sound should be the most important reason for a purchase.
For those with deep pockets this may add up to nothing more than a big yawn. Because, if the latest version of the PowerCell does not meet expectations, or if the Qx4 does not match the Pro, then who cares. They can be sold off at a loss -- who cares -- and replaced by another expensive product. Who cares.Hmmm! I THINK the root of your frustrations / BLAH BLAH BLAH is your SHALLOW pockets???