I'm an amateur; so is anyone who doesn't do this for money.
Anyway, whether these are $10-30 or $90 or $125 each, they are roughly in the DT price range. They are not earth shaking in terms of performance, but they are good. They up the bar for price/performance considerably. And, at least in the near term they require you to source the amps (thanks Steve), and some appropriate power supplies. These are not yet turn key systems in a nice neat box.