stick with a quality product like JL Audio or something, plus if your gonna get 2 12's, 1100W is pathetic, I got one 12 inch JL Audio W7 thats a 1000W and its loud as fuck and sounds clean.
I cant even find anything low enough to compare to that trash. I would do subwoofer and box seperate. Normally packaged deals are cheap peaces of shit. Granted if you spend 600 on one they seem ok but for that price you can get something way better for half the cost buying them seperate.
they actually hit pretty hard for what it is. My friend has em.. because they didnt have the pioneers he had after his blew and he tried to exchange. He's pushing them with a Rockford Fosgate amp.. It sounds like he has 2 15's.