I might...? There are some good Car Audio subs out there, like the Infinity Kappa Perfect 10.1, that can be used as a home sub. That crown would power them nicely.
If you are looking for more intense bass, sub(s) are the way to go. If you are looking for more detail and better soundstage, the C-1 w/ BillD mods is the way to go. Only you can decide.
If you need advice on good, used powered subs, PSB and Velodyne bargains are out there.