[sdiy] Passive filter design program ?

[Haible Juergen]

Hi, 

I'm looking for a profound filter design software for *passive* (RLC)
filters. This is not for synthesizers (as you might have guessed),
but for my work at Siemens. 

Therefore I'm not looking for the cheapest DOS shareware, but rather
for a maximum of possibilities and a very good user interface.

So far I've tried a demo of "Super Filter"
(http://members.aol.com/_ht_a/sfilter/)
which looks quite convincing for somebody who comes from active filter
design
only (me). Is this state of the art, or are there better programs available
?
I've also seen the "Filter Master" page
(http://www.intusoft.com/filtermaster.htm),
but the description looks not as promising.

Any recommendations ?

Allthough this is slightly off-topic (and then again, maybe not), I know
there
are enough experts on the list for such questions. 8-)

Any helpful hints are welcome. (Looking for *passive* filters, mind you,
not Filter Wiz and the like.)

Thanks in advance,

JH.