I can't tell you what you should look for since you taste,wants and needs are likely different than mine. These are things I look for in a head unit: Looks-the unit has to be attractive, I like a deck that does't have an overload of buttons, keep it simple stupid is my theory. When I was shopping for my current deck, I had to have one that had 3 sets of rca's for system flexability. I wanted a fullscreen fold down detachable face. Other cool features are adjustable crossovers, eq, bbs processing, sub phase control, angle adjustable face, remote, and Sirius satellite radio ready. Knowing your needs is a must when deck shopping.