I have a PSW1000 and can't wait to upgrade. That being said here's my reason:
Let's start with the good points.
This sub performs exactly as the specs state. Overall good to great performance with MOST music. As far as looks go it gets high marks. It's rear ported, and with that in mind, relatively easy to make happy as far as placement. The amp is a BASH design, very effecient, runs cool, and has power to spare.
Now onto the bad points:
This sub performs exactly as the specs state. Don't expect to get much output below 30hz. This isn't much of an issue with music, however with movies the presence of LFE WAY below this is becoming more common. When asked to play material this low the pair of 10's bottom out rewarding you with sound not unlike tapping a coffee can with a spoon. The cave emergenge scene in Iron Man sounded like there were tiny metal workers hammering out bullet dings in the armor. Keep in mind the content referenced is well below Polks stated -3db point, and not a performance flaw.