I've been looking at some different mods for the Boss SD-1 SUPER Overdrive and was wondering, which do you guys feel is the best mod.

Keep in mind I basically want a more versatile and better tubescreamer.
Monte Allums mods are very well regarded and quite cheap as well.

Robert Keeley mods are probably the best, and they will do it for you, but its considerably more expensive.
Ibanez S470 (Condor/Pyro/Warthog)
Rockafeller Custom
Laney Lionheart L20H
Framus FR212CB
Morley Bad Horsie 2
Boss DS-1 (Monte Allum Mod)
Boss DD-6
Electro-Harmonix Small Clone
Dunlop/MXR Phase 90 (Full Script mod)
Voodoo Lab Pedal Power 2+