w12gti mkii

I have 4 JBL W12GTi MkII Whats the best amplifier(s) to use for these? I don't mind spending the money if there good, right now i am thinking of getting 4 JBL GTO-1001EZ and running each one to a sub. I don't know if that's the right way. Is there a better way? Some Specs: Peak Power- 4000W...