I just purchased a new hu a pioneer DEH-8600mp. I have a F350 superduty. I want to hook up 3 amps. They are kinda old. A KAC-721,KAC-821,KAC-921 to this h/u. I was looking on suggestions on speakers relative to being able to push the power and keep clean from distortion. I am old school with this stuff and this new school technology is a little.............WOW.