I am putting subwoofers in my car what kind of amp should I use? (See details)?

[Gang$ta]

The subs I bought were these

http://xplodsony.com/xplod/subwoofers/XS-L120B5D

If you can tell me what watt amp I should get and any suggestions that would be very much appreciated.
thanks tuff d.. people have no lives nowadays lol

 

[sparky3489]

A mono amp that's 600 watts RMS @ 4 ohm

 

[Tuff D]

Dont click on the first two responses links........likely spam or viruses.

 

[23 Air jordan St]

A good RMS is better than good watts ask for them having a rms to closly match them.
Mono block