Hello, I currently have 2 ampeg 18E SVT cabs (8ohms) 175 watt and i'm looking for a head. I am currently using a crate guitar head and the amp is blown, i use the line in to power the speakers and have a sansamp for my preamp. what kind of head should i look into and what powering? Sorry i know nothing about ohms and watts and how to get the most out of my speakers. i'm in a band with just a drummer and need to play really loud. Help please!