Paul Winkler wrote:
> 

> I've been playing around with various csound reverbs I've found on the
> list or on people's web pages. So far nothing I've found sounds as
> smooth as I would like.

It is amazing to me how dry it is out there when it comes to reverb.
I have long been looking for a fully configurable command line reverb
filter that has that unmistakable realism that you are talking about.

If command line is not important to you however, that is, if you don't
need to be able to set up programs to run the reverb automatically, then
you might have a look at the Snd sound editor:

	http://ccrma-www.stanford.edu/CCRMA/Software/snd/snd.html

It has a reverb feature that can be auditioned and configured
in real-time on a good machine, and then applied to the actual
sound data in memory. The sound is pretty believable.

Come to think of it, the DAP sound editor has some very impressive
dsp algorithms, including reverbs with more parameters then you 
might know what to do with.  The difference is that it is much
slower (this is a good thing!) so one must wait for some time to
hear the results, and then go back and tweak some more.

These two are for Linux, but if you deign to boot into that other
hard drive, then I can tell you about a hardware option.  The
soundblaster live has an impressive set of dsp effects built into
the card, and the mixer has an option to let you record from the
wet output directly.  It's like having a regular digital reverb box
without the analog in's and out's.  Drivers for the card under 
Linux are in the works, but I wouldn't bet on the full use of the
synth and dsp stuff.

Now that I re-read your message, I see that you may have meant csound 
reverbs only.  Oh well...