I have the fx aid xl which is 6hp and I really like it - more space and more modulation inputs

one big plus point about it is that Igor seems to constantly post updates

there's also similar modules from erica, endorhin.es and tiptop but I don't think they have quite the versatility

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities