polk audio or infinity speakers which set is better for my car ?

Which is better polk audio mm series or infinity kappa series and perfect.

http://www.sonicelectronix.com/item_14715_Polk+Audio+MM691.html
http://www.sonicelectronix.com/item_15059_Polk+Audio+MM6501.html
or
http://www.sonicelectronix.com/item_13965_Infinity+Kappa+693.9I.html
http://www.sonicelectronix.com/item_2742_Infinity+Perfect+6.1.html

or
http://www.sonicelectronix.com/item_13965_Infinity+Kappa+693.9I.html
http://www.sonicelectronix.com/item_13447_Infinity+Kappa+63.9i.html

so which set will be louder and clear with good highs and mids not the one with the most bass got subwoofers for that and yes im gettin an amp for the one i choose thanks if u can help.