wow. those gd series look very well built. i find the brown board of the OPs post ironic to audiopoop, but all i see is good quality. i feel it will do a little more than rated...
the older AP definately strikes me as great amps.. i am a fan, just never ran em.
however, to the post a few above, you may be running the coils at .5 ohm, but with vehicle and box rise, your easily sitting at 1ohm or greater man. now thats not continous however. it is possible for it to drop under 1 ohm on certain tones