well, i have a lanzar amp and it seems to be pretty decent. i dont see why the speakers couldnt be pretty decent also. i dont know if they compare to the market leaders, but hey if the price is right, give it a shot.
like loudcar412s said. if the price is good then get em but if you can get fosgate , kicker or some other brand you might want to try that. Hell even kenwood or Infinity would be better.