this comes down to presonal preference really. if you feel the need the need to have kicker speakers thru and thru, do it. Just make sure the amp matches the speakers nicely My personal preference was (and still is) Clarion / Kenwood for speakers, Kenwood / Clarion head-deck, Rockford / Kicker subs and Clarion amps Wot i got is something slightly different Kenwood KVT-747DVD head deck 2x 6" 120W Clarion Fronts 2x 6x9" 150W Clarion Rear 2x 12" 800W Rockford Fosgate Subs 4x100W Clarion Amp (cabin speakers) 555W Sony Amp (subs) Sony isn't my 1st preference by any means, but the price was good and it does the job. my 2 cents