i am still interested in a sub-out module, but i worry about the price. unless things have changed, i seem to recall that the sub-out goes as an addin to the digital-out, therefore requiring you to buy both modules.

speaking of the digital-out.... i would buy one of these if there were more avaliable amps that support digital and doesnt cost an arm and a leg. if there was even a product that went rca -> digital -> rca, it would replace the monster rca cables from my empeg to amp, and hopefully eliminate the noise that it picks up while going from the front of the car to the back.