I plan on getting some subs in my car and have some stuff picked out, just wondering what you guys think.

Head unit- Sony CDX-GT730UI (cdxgt730ui) In-Dash CD Receivers with MP3 / WMA Playback In-Dash Car Stereo Receivers and Head Units Car Audio and Video - Sonic Electronix

Amp- Can't decide which one would be better?
Rockford Fosgate Punch P500-2 (07-p500-2) 2-Channel Amps Car Amplifiers Car Audio and Video - Sonic Electronix

Kenwood KAC-7204 (kac7204) 2-Channel Amps Car Amplifiers Car Audio and Video - Sonic Electronix

And the sub- Rockford Fosgate Punch P3D212 12" Component Subwoofers Car Subwoofers Car Audio and Video - Sonic Electronix

Let me know what you think