Doepfer Quad Decay thing is pretty awesome, yeah. I've been trying to get more people into LFOs with a reset input. They really make great envelopes, especially when they can be hit with CV. (This is part of the reason I suggest VCDLFO.) Also, check the WMD/SSF ADSRVCA - pretty worth the money. Slew limiters and waveshapers, too, can do wonderful things to gates and the like... Analog Ordinance Shrapnel? IDK... maybe I have just gotten bored with more "traditional" envelope generation.