wanting to upgrade. considering two combos. the first one is using a cobra 200 with built in amp to drive a dave made 6 pill 600 using 6 2879's a 10k 22" shaft the second combo i thought of is a cobra 25nw or a 148nw using a dave made m400se thats 2 2290's driving 4 2879's and a 22" shaft 10k some thought from the experiance folk these combos pleazzzzzzzzzzzzzzzz !!!!!!!!!! :roll: :roll: :roll: