)I'm a big fan and user of their DX Reverb, so this may well be worth demoing.
Their newsletter:
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SPAZIO 1.0 RELEASED! THE NEW STANDARD OF QUALITY IN REVERBERATION
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ANWIDA Soft announces the release of Spazio 1.0.
Thanks to the new HAI(*) proprietary technology, Spazio sets a new standard of
quality in the field of synthetic reverberation.
Years of research into acoustic and audio DSP are condensed into an efficient
and reliable product that sounds unique.
Spazio offers natural and dense acoustic space simulation, vintage plate reverb
and powerful special effects as gate and inverse reverb.
A natural workhorse for your studio. Never lose time again to avoid metallic or
inferior sounding settings.
Spazio will always provide you a luxurious sound. And this is even easier thanks
to its user interface that allows you direct access and fast editing of the
parameters while keeping a very precise control.
Spazio embodies the high quality, efficiency and rock solid stability that the
demanding professional is looking for.
Spazio is available as a PC DirectX plug-in.
* Hybrid Acoustic Image (HAI) - Physically inspired modeling applied to the
simulation of acoustic spaces and spatial effects. HAI technology allows you to
model the spatial image, the resonances and the modal and echo densities of a
real room.
Main features:
* proprietary HAI technology
* professional quality reverb processor
* room, hall, plate, gate, inverse algorithms
* true stereo reverbs that will not affect stereo imaging
* intuitive and ergonomic interface with high resolution controls
* 64bit internal precision
* highly optimized DSP code
* ultra clean and noiseless processing
* full MIDI automation support for all controls (including preset change)
* audio output is consistent and glitch free during parameter changes
* factory presets
* built-in preset manager
* A/B comparison
* the value of control parameters can be inserted manually
* stereo output (mono->stereo, stereo->stereo)
For more details about Spazio and free DEMO downloads see http://www.anwida.com