I think a $600 speaker system can sound just as good as a $1,000 system.
Some could argue that a $740 sub could sound almost as good as a $1,400 sub for most music.
CEA Standard 2 Meters SPL @ 20/32/40/50/63 Hz:
$740 Outlaw LFM-1EX: ....101.0/110.7/112.3/113.7/113.8
$800 Power Sound XV15: 102.7/109.6/113.7/116.6/114.7
$1022 HSU VTF-15H: ......103.9/113.0/115.7/115.7/115.6
$1400 Rythmik FV15HP: ..108.1/117.0/119.5/119.1/118.8
So I can why some argue for dual Outlaw subs + $500-$600 speaker system. I see the point. If we were going for the pragmatic approach, I would agree with this option (or similar).
I guess I'm going for the idealistic approach.
Give us something to argue about.