Now I know "best digital filter" sounds like a complete oxymoron. I love classic filters and octavers that are analog and I know they will always sound bigger and warmer than digital, but I would accept a minor concession to achieve a single rack space replacement for all my pedals. All the quality units that are known to work well for Bass EQ, Comp, Chorus and time based effects, aren't mentioned for their envelope filters. Are they all that bad? Based on your experience, which unit below does best octaver and envelope filter? Has anyone gotten a reasonably credible octaver/envelope filter out of them? Boss VF1 Lexicon G2 Eventide Eclipse TC (G-Force/G-System) Thanks for your input!