I just "upgraded" my equipment this year, and I am wondering what else I should add to my setup to get better sound, make it easier to transport, and just look better. Currently I have 2 Peavey DM112 powered speakers, Numark Mixdeck express, Behringer Xenyx 1202 FX mixer. I am looking at purchasing a Peavey DM 18 inch subwoofer. What else could I need?