Gsteg has turned me over to the Elemental Designs and IDMAX side. After looking at the specs they are really nice. (before note: I hate kicker)On the same note:
I recommend
http://www.edesignaudio.com/ep2/12o.htm
or
http://www.sounddomain.com/sku/IDSIDMAX12V3D4
The elementals will be at their highest excursion at 750 to both subs, so 1500 should do well