Well new filter types might be inevitable...considering the ION.
There is one filter type I wont be needing and thats the JUpiter 8 b'cos Ive just got hold of another one (well my band m8 has atually). Unlike the JP8 I owned this one is mint from an anlogue dealer....cost nearly ?2000 though
Goto
http://www.vintagesynth.org/artists/ap_ub.shtml and listen to 'Botz' or 'Moondusted'. Then you'll understand why people still want to use true analog weeeeee.......
Those piercing rising synth sounds are Jupiter 6 or 8 for sure. I love the dirtyness of pure analog tracks.
DS