Has anyone played through or owned both the Ashdown MK500 and Thunderfunk? Better yet, through a Accugroove El Whappo? I am considering getting rid of my rack in favor of a couple of pedals and just a head. My playing is split between bridge p/u finger funk, aggressive slapping and occasional chordal/tapping work. I've heard the Thunderfunk pairs well with the Whappo, but I have not played one. I played the the MK500 and liked it, but did not demo through a Whappo. Can anyone compare and contrast the Ashdown MK500 and Thunderfunk is terms of articlation, quiteness, warmth, tightness of lows and transient response? Which one would work well for me?