I'm looking for an envelope filter, and recently I've been turned onto the Electroharmonixs range of products. Various people have recommended them to me, and I'm thinking of getting one of them. The question is which one? The ones I'm interested in are: Q-Tron Q-Tron+ Mini Q-Tron Doctor Q I play a wide variety of funk based music, and would also like to perhaps add more effects into my sound as I progress, but I think an envelope filter would be the best thing to get right now. Thanks for the help.