I've been a "dye'd in the wool" Peavey user for many, many years but I'm getting too old or too lazy to slug those big heavy speaker cabinets around and lift them over my head for every gig. What would you recommend? I want the same quality of sound and durability but not the weight. Anyone out there using the new lightweight plastic stuff? Does it work well enough to really do the keyboard justice? How heavy is it?