i've used several digitech/zoom/boss/bbs FX pedal boards,
some were real nice for effects, but i never got impressed with the distortion or Real sounds
then i once played on a Tech21 XXL, distortion stomp box, real fkn nice sound, agressive,
i bought me
a Tech21 sansamp PSA-1 and wow i'm impressed, gives A LOT of different sounds, great control over distortion, lots of amp simulations,
nothing sounds like a mic infront of a marshall cabinet but i'm really pleased with the sounds!
i've used it on vocals, big fun, guitars are great, mostly for distortion,
and now our bassist jams with it every week, i find it the best amp sim or DI thing for gut/bass
they got a new version out and it even exists as a software plugin