Hey guys, I'm looking for a really heavy rythm distortion pedal for my board. Im using a classic 50 as an amp. I had a keeley modded ds-1 but I am now looking into 2 main pedals....the MI audio Tube zone and maxon sd-9. If any of you guys own these do you think they are good for very high gain rythm leads? (mainly power chord work...i have the bb preamp for my jazz chords). Would distortion pedal would you recommend for high gain stuff a la tool and NIN. Thanks for any input.