first off, i was following SI for years, just never bought a driver till i saw the new Mag 15 which i had before the boner really started(bought directly from nick). Second, i have a set of kicker resolution 6.5's up front running off a mtx 2300xw(150x2) but closer to 200x2. Third, i got a great deal on the zx1500.1 so i have to use it, but the only reason i bought another Mag 15 is, it's cheaper than me buying two other woofers (mag 12's,bm 12's) or any other dual woofer set up that is decent. With the power i have there may be a better choice for a dual woofer set up that cheaper but i already had one Mag 15, so it's was actually cheaper to just buy another. My friend thinks i'll upgrade but i hope i am finally satisfied when i have both 15's installed.(two 15's aren't installed yet, waiting on other MAg 15 to arrive).