Is my only "decent" option for an aftermarket 15" 16 ohm driver the Eminence Delta-B? I can't seem to find any other options? Am I missing something? I emailed Eminence to see if they make a "Neo" 15" driver, but I received no response. Needs to be about 200 watts RMS. I have an 8 ohm cabinet with two 16 ohm drivers wired in series. I'd rather not convert it to a 4 ohm cabinet.