Final decision?

I've moved around a lot in choices. But I think I'm finally settled on what I want.

For my side doors I've decided to get Hertz Hsk 165 XL's
Which will be powered by a Rockford Fosgate p800-4

I'll be replacing my cdt 690's with the hck 690's hi energy
Those are currently powered by a Rockford Fosgate p400-2

Of course I'll be adding sound deadening and such.

Does anyone have any suggestions on anything I might not have looked at that would sound better for under 600 a pair? Or anymore personal inputs with the hertz speakers.

I run the XL's and probably the best comps I've heard in that price range. I had them bridged off my Eclipse XA4000 taking 350rms. I don't know the newer RF amps, but if you can find/afford it go with a better quality amp, audison, hertz, zapco, eclipse(if you can find them).