I have no experience with those synth pedals. But I love organ sounds too.
The EHX POG is amazing for that, but more for a classic organ.
Hammond... overdrive plus leslie effect (or sinewave tremelo)
I recently tried to mix those while borrowing some of my guitarist's pedals:
BOSS LS-2 to blend 2 loops:
Loop A: some Ibanez Tubescreamer plus my EBS TremoLo
Loop B: EHX POG plus Line 6 Verbzilla.
It sounded awesome.
Look into overdrive and Leslie effect.
