Which ZVex Boost: Super Duper 2-in-1, Super Hard On, or Box of Rock?? Guitars are Gibsons (humbuckers) into nonmastervolume Marshall style amps, music is blues rock. Looking for a clean boost to kick it up without adding a lot of low end color as the amps have a lot of low end already. Which boost matches well with this setup out of the three ZVex offerings??