Contour Enthusiasts Group Archives Forums Modifications Audio infinity speakers or mach 360 speakers?

i have a freind who's willing to sell me his whole mach system that he had in his mustang gt. he's also got some infinity 5x7's he'd sell me. i have a nak cd40z right now. which would you take? just the infinity's powered by the nak or replace the nak with the mach system? thanks you for any help you can provide.