one more vote in favor of 2445 - I don't own the Valhalla reverbs. Come to think of it I own very few reverb plugins, I still rely heavily on hardware for reverb, but that is changing. Right now the PSP 2445 and Spring Reverb are pretty much in permanent spots in my template, along with UAD Plate 140 and Ocean Way Studios (not strictly a reverb I guess) and Reverberate 2.
When I tried the demo I was immediately struck by the complex, animated nature of the reverb. That's really what I purchased it for - I upgraded Reverberate before the holidays, and I really like V2, and it does some of that animated thing, but not as nicely (for me, perhaps I just haven't figured it out yet?). Anyway, an animated reverb was what I felt was missing, and I was struggling with choosing between brilliant Valhalla Vintage Verb, the brilliant Exponential Audio R2, and the brilliant UAD 224. Tried them all, loved them all... Valhalla was winning based on price, and the fact that the differences between the three were so miniscule - cases of different, not better/worse.
So I'm pleased with the new PSP plugin. I think that for a little while I'll be one of a few using it, so maybe I'll be a little different<G>!