Yeah, some of the china stuff isn't that bad. You just have to push them to produce quality, it will always be cheaper there because labor is cheaper. The Sundown amps that are made in China are not that bad. And I think personally, the Maxxsonics Brutus and some of the other smaller Maxxsonics amps (but not all of them) that are made in China are top-notch, just as good of quality as the Korean made amps of their equivalent size. So the product being "Made in China" doesn't mean the quality isn't good, some are some aren't. Best way to gauge it is ask around to find out who is "happy" with their "Made in China" amp, alot of people are.
As far as features vs ? I am not sure. I think most amplifiers at least, since I don't deal with head units or any other components, just amplifiers, most amplifiers features suit the needs of the consumer already. People are simply price vs performance vs durability on amplifiers and I think that's always the way it will be with amplifiers.