They can get insanely loud for a $200 woofer, but the amount of time that they can play loud is what the difference is. 1000-1200ish watts is good for daily.
yeah this thread isn't really needed anymore unless I change my mind about subs. I think im gonna get her a Mach 5 IXL 15 and run it off one of those Hifonics Brutus 1200 watt amps. That should be more than loud enough for her.