Hey guys! I will be looking into purchasing a new rig soon. I play metal, and I need something that can cut through two deafening guitars and machinegun bass drums. I always see metal bassists rocking the classic ampeg 8X10 cab. I just want to know what everyones opinions are on various speaker sizes. Right now I use a 2X15 cab. So what are the ups and downs of 10, 12, 15, and rarely but sometimes 18 inch speakers?