My Ampeg B3158 is absolutely destroying my back. I am going to upgrade to an Ampeg SVP and a QSC PLX1202. Since the rack will only be about 40 pounds I need to purchase some light weight, non-exspensive cabs. My cab choice will be a 4x10, and either another 4x10, or a 2x10 as a monitor. Are there any companies that make light weight cabs at the price of Avatar cabs, new?