I'm sure it sounds like a stupid question, but here goes. I haven't personally been in vehicles with much more than 300-400 watts, if that, powering the sub(s).
I'm asking this question in terms of quality components, not Best Buy items.
How much "harder" or better sounding will a single ported 12" sound that is rated for and fed 1000-1200w RMS compare to one which is rated for/fed ~500-600w RMS?
What I'm trying to get at is if there is much return in sound from the extra money on the extra wattage on a single driver. I assume that the sound/watt isn't linear.