Hi all, First of all let me start out by saying how happy I am with my 12" ICON I bought almost a year ago. This thing blew me away for the price I paid, but now I want more! Right now my setup is 1 12" ICON powered by a Sundown Audio SAZ-1000d and I have a couple of questions about upgrading... 1) Should I get another ICON or upgrade to 1 XCON? (either setup will probably be going in a sealed box) 2) Was thinking about purchasing another SAZ-1000d and using the master/slave feature to power whichever setup I go with, or would you recommend buying a different amp at like 2000 watts RMS instead of linking two together? Also, cost is important to me.