Amp question for my subs?

Personally I would go with the Kenwood, then the HiFonics and last the MBQuart. Just because your speakers can handle 1000w does not mean you have to have that big an amp. A good rule of thumb for subs is 1/2 the wRMS of the sub is the least amount of power you want. So a 1000wRMS sub needs around 500wRMS. but will pay fine with less power, just not as loud.