The other guitarist in my band has been talking a lot about getting a preamp/poweramp set-up as opposed to the standard head and cab option. I've never heard much about this type of set-up and most concerts I've seen the players usually run heads WITH rack type systems. What are the pros/cons of running a preamp and poweramp with a cab as opposed to running a head and cab. Also how much would a setup like that cost and is it worth it? What are some companies to check out for these types of things?