Actually, my suggestion would be the Tiptop Forbidden Planet, cosmetic issues be damned. The price is excellent, it's very straightforward to use, plus hiding behind that panel is the craziness that IS a proper Steiner-Parker Synthacon VCF, but with the added fun of being able to input to more than one response curve at the same time. The original didn't let you do that, but it WOULD just about tear your ears off in extreme BP and HP settings...definitely a lead-voice screamer!