mag can definetly take 1200wrms easy. actually, i think some1 on the stereo integrity forum said he took out his sx fomr a box and dropped in a mag and the output was the same or even louder for the mag. the mag will have better SQ as its a SQL driver...
lol....SX....I tested a SX to my 2nd Gen Mag and the Mag was better than. The 3rd Gen (current) are better than the 2nd. So take it like it is. I'd get the Mag, price is more, but you're getting a much better sub.