Subwoofer recommendation for swarm

I'm looking at buying the 10 inch subwoofer kit with the external Dayton amplifier.  Which driver is recommended, is the one that comes with the kit a good one?  The price is nice the stock way but I have wiggle some room for better drivers. I'm planning to buy 4 of them. Any thoughts? 

I've started my subwoofer swarm project. Just ordered 4 Duke 24 kits.

I just finished putting together my subwoofer swarm.  4 12" drivers spread throughout the room.  Doing the first listen now.  It's totally changed my system for the better, I don't even recognize it. 

I haven't measured my frequency response yet, but will be doing so soon.  I'm still experimenting with location. Need to do that by ear and takes awhile.