I dont quite understand.....Are you calling me a shop keeper?
If not then my advice stems from my personal current setup.
Which is a 4 channel Alpine F6 amp powering my front components and rear co axials.
An Alpine Mono M12 amp powering my Type R sub.
And so my HU does not power any speaker. Rather the rears and comps are powered by the F6 amp.
This setup is till I find the time to go active. Once active I will add one more amp which might just be for the front components.
Everyone has their own suggestions. YOu obviously need to research and make the best decision for you.
Good Luck