I installed a XD700/5 in my daughters car (4x 6.5" drivers, 1x sub) and I have to say I was blown away. I had no idea such a small unit could pack so much wallop. Its not the most powerful amp I have heard but very loud & clean. I drove 2 x 12" subs in a ported box in her small car and the mirrors were rattling inside and out, the mud started to fall out from under the car, I thought her eyes were going go pop out of her head. She wasn't sure she wanted to take up that much trunk space for the sub box but after she heard it, well, it's still there.
I will only be driving 6.5"' & tweets with mine so it should work just fine.