Well, the fx91 can be found for cheap on eBay now and then, I've seen the fx92 go as high as $150, I really prefer the 91 overall, it doesn't get crazy but it sounds sooooo ****en good!!
and yeah, the 92 can go almost fuzz if you roll back the "zip" knob and turn up the "stupid"!! it can also get harsh like a rat can, it is tricky getting good straight overdrive though, its like barely then super heavy...
I actually use a sample setting called "meaty treat" out of the manual, its super clanky , pretty clean though, I set the grunge real mellow with blend and "stupid" knob pretty low, it gets me a nice cranked amp vibe.
neither loose any low end, the grunge has a separate stereo out for biamping, but it is real noisy(at least mine) on the clean sound...
really underrated pedals, Johnk is the only person I've seen review the bass overdrive and the grunge actually was released before the boss bass overdrive!!
that grunge was my 1st pedal, bought brand new about 1995....
edit: I also have the later DOD death metal, that thing is a monster, great for bass
