For Upright and Bass Guitar... Currently using the Acoustic Image Clarus SL and Bassbone Tonebone 2 channel Preamp. The Bassbone is great but it adds another component in the line as opposed to just using a 2 channel amp like the EA Doubler or another 2 channel amp. I wonder if something is lost by having 2 components in the chain. (besides more set up time and more EQ to mess with) Im thinking about selling the Tonebone and the AI Clarus and getting the new EA Doubler. Any other 2 channel amps good for doubling that you like? Walter Woods...Tooooo expensive! Thoughts?