i would go with mtx for speakers and amp as long as you dont have a budget limit.
Look into Yzen amps....not well known but i'm telling you they are awesome amps.
1500 watts and most likely need 2 amps? naaaah. there's plenty of powerful amps out there that could power 2 1500 watt subs. i had some 18" kicker solo x's, and liked em at first. then they seemed to go out on me. not sure why, but i got rid of em fo...