No poor quality is very objective.
Look at the guts of that amp's big brother:
... and then look at the guts of my amp:
So a boss amp has very few components in it (even compared to an amp whose output is supposedly 1000w less) and based on price, I'd guess that they're cheap parts.
No, I don't have Boss failure rates, but the pictures speak for themselves.
So, 2 of those amps at 400 a pop, or 1 of my amp, at 900.
Again, the amps I showed put out the same power, with the same quality as the JL, but cost $200 less. The boss amps put out "the same" power with terrible quality. I fail to see your logic.