I started with Perfect Space, and upgraded to Pristine Space. I am disappointed that it doesn't look like it will make the leap to x64, so I'm looking at others too.
Reverberate is pretty cool, but I haven't picked up the paid version yet.
Freeverb is remarkable - I keep trying to figure out the catch.
And I was very pleasantly surprised by Waves IR-L.
I've been tempted to try SIR2, but SIR and I never really got along - quite possibly due to the latency, I'm not sure. Funny the things that can leave a bad taste.
Any of these could be the ticket for me, but I'll take my time evaluating because I really hate switching platforms or plug-ins, and Pristine Space is still working for me.
The real key, as others have pointed out, is the IRs. Samplicity has some really well done IRs, both free and for purchase. There are a couple of web sites loaded with free IRs, and you pretty much have to download them all and then sift through them to find the gems, but it is worth it. Follow the links at the Voxengo site to get started.
I should also add that I remain a big fan of algorithmic reverb, and over the last couple years I've gone even further backwards<G>, using hardware processors as much as I can. I find it difficult to beat the sound of my PCM-90 - that could be all in my mind or it could be real, but I really like it. Recently I started playing around with the Valhalla reverbs, an they come awfully close, and the Exponential reverbs might even be closer still, although they are a bit more of an investment. (quick edit: if you want to demo the Exponential Audio plugins you will need an iLok2)
It's moot, for me anyway, as I have reached the point where my monitoring system is not really up to the task of exposing the subtle differences, so that's really what I need to focus on now<G>... it's always something !
post edited by wst3 - 2013/09/21 10:42:05