The bxi2008 is not over rated. It does rated at 14.4 volts. I own one, but my electrical keeps above 14 almost all the time, so I probably have a lot better luck with them than some people.
I got it to put out 44.7 VAC at half gain on a flat eq.
Take a look at the aq 2200, similar board with a few extra caps. Like I said before I think the reason they're getting called over-rated is because as a budget amp people without beefy electrical are buying them and not getting their full potential.
I think they're one of the better "for the money" amps
Look a the guy who tested and reviewed his bxi 2608ds on here not too long ago.... the amps were fully capable of rated. As is mine. Eventually I will do more thorough testing.
Just remember, you're not gonna get exactly 2000 without a nice electrical.
Another thing is, I can play my amp at full tilt for an hour and the aluminum heatsink is still cold to the touch. We will see in the future as far as reliability goes.