MBQUART vs INFINITY

HELLO TO EVERYBODY
I M IN THE MIDLE OF A BIG DECISION.
TO CHANGE MY WHOLE CAR AUDIO SYSTEM.
I WAS TOLD ABOUT THE MBQUART DISCUS 216  
AND INFINITY Reference 605 COMPONENT SPEAKERS FOR THE FRONT DOORS.
DOES ANYONE KNOW ANYTHING PARTICULAR ABOUT THEESE 2 SPEAKERS ??
I WOULD LIKE SOME HELP ABOUT THE QUALITY AND POWER THEY CAN HANDLE.
WHICH OF THE 2 SHOULD I CHOOSE?
TELL ME YOUR OPINIONS.

I've listened to both the Infinity's and the MBquart's. I've never been a huge of the Infinity's. The MB's are the nicest car speakers I've heard. In terms of power, they will probably handle about the same, but the quality of the drivers in the MB's are better with a smoother top end. They are as close to home speakers as you can get in a car. If you are going for a whole car system the MB 6 x 9's are also really nice. Infinity's 6 x 9's aren't in the same class as the components you're looking at. Also, MB make some really nice subs, but the Infinity Perfect Kappa subs sound pretty amazing as well for less money.