The Moogerfooger lowpass and the EBS IQ. The iq is small and isn't bad for its small size if your pedalboard is already stacked. As you mentioned and I have only heard (the short demo on bassfuzz.com) of the 3 leaf. But what I heard it gets a pretty close sound to the meatballs. The moogerfooger I like for its ability for expression pedels. My problem with many or should I say 90% of the pedals is that without the ability of expression pedels you are getting what you set it up to be. If you want any changes you have to do it manually. But in a way thats not a bad thing either except if there are other usable sounds with that pedal.
I recently bought a stereo polyphase and it has the option to have a envelope mixed with the phase which gives it a nice effect. And you can use an expression pedal with it. The envelope filter part isn't as radical as a pure envelope filter but with a phase it is nice.
Again I mention the IQ by EBS. I have worked with it for awhile and it is very sensitive when turning the knobs ever so slightly. But the sweet spot is really nice in all 3 positions. High Low and wah. Its a small box but very nice. I heard some bad reviews but some really good ones to( thats with every pedal right?). I would check it out. With there Octave pedal its get an amazing sound and work well together.
Just a clarification regarding the Polyphase: The envelope and LFO modes both sweep the same notch filter rather than there being a phaser and an envelope
filter(ie lowpass/bandpass) in the same pedal. In envelope mode, your playing dynamics sweeps the notch filter in a given range set by the knobs, giving you the 'envelope phaser', and in LFO mode the LFO is sweeping the same notch filter. (so the envelope is just a different means of sweeping the same notch/phaser and a parallel would be using the MoogLPF with the Envelope for envelope filter, or with the envelope off, and sweeping the Freq input with an LFO for 'autowah') I think this is also partly why the Envelope side of the phaser is not as thick or obvious as an envelope
filter, as it isn't affecting as wide of a frequency range.
One other little tidbit about the Moog LPF and envelope phasing: With a Moog LPF and a phaser with an exp input, you can do envelope phasing by sending the 'Env out' from the LPF into the sweep input of the phaser. You keep the Moog LPF bypassed (dont
have to though) and in line before the phaser so the phaser will receive the full unfiltered signal, and the envelope created by the LPF will sweep the phaser(instead of manually with an exp pedal, or automatically with an LFO). With the Moog Phaser you would patch the LPF's 'Env out' into its 'Sweep' input, with the Phasers LFO controls set to 0, or you could actually mix the Envelope in so that the LFO sweeps the filter at a set rate/range, and the Envelope will add further modulation on each attack that will start and stop based on the position of the sweeping LFO. You could even do this with the LPF+Polyphase if you wanted a different Envelope profile sweeping its phaser, and the Freqbox can be used for its 'Env out' in place of the LPF, though I find the LPF to have a better envelope for these applications. Going further with the Env out from the MoogLPF, you could patch it into any acceptable Input to modulate different parameters: If you sent the Env Out to the Phasers 'Rate' input and had the LFO on, then each time you hit a note, the envelope will speed up and then slow down the rate of the phasers LFO sweep, or into the Resonance input, etc...