Blown Camaro Speakers

Thanks for any help!
 
2001 Camaro Convertible w/ factory Monsoon radio and factory speakers.
 
Speakers are rattling, especially with base.
 
Anyone want to suggest replacements?  I don't want to SEE any modifications (in other words, I want the new speakers to fit behind the original grilles or covers).  What size?  What shape?
 
THANKS!  --  Eddie

check best buy, frys electronics, or any other steroe shop for suggestions.