Ohmicide is an absolute beast and can be used in a wide variety of situations. I often use it as a sort of EQ/distortion on drums (as a send), then mix it back in with the clean drums. You can get a whole load of tones out of it, and can also just totally mangle sounds beyond recognition without much difficulty if you want.
I will vouch that filterfreak is amazing. a more transparent/low cpu filter sonalksis tbk I also find very useful.
For distortion I've been using the D16 modules (decimort, redoptor, devastator) non-stop. you don't get the instant satisfaction you might from the ohm brothers stuff, but if you know what you're looking for you can get really tastey results with the right dry/wet settings, and the right combinations.
Currently running 2.66 GHz Intel Core 2 Duo MBP / Logic Studio 8 / Ableton Live 8 / Apple IIe / Marble Madness
Isotope trash is pretty good too, very nice warmth to it, highly customisable. I also really like the scream distortion in reason, you can get some ace sounds out of that thing, but you'd obv need to be using reason for that.