Lexicon was my favorite until Fabfilter Pro-R came out. TBH, anything by Fabfilter is best for anything
It's, in my opinion, the best balance of flexible and intuitive of the "transparent" algorithmic reverbs I've tried. It's really good at positioning dry/dryish signals in a space, and it's light enough that you can put many instances on smaller groups and tailor the dampening and EQ as needed.What's nice about fabfilter's? Curious.
I think Seventh Heaven is absolutely great. Especially with a algorithmic blend like b2 of Pro-R. I wished B2 was less cpu consuming.... :(For orchestral use, I use VSS3, FabFilter Pro-R, Lexicon and 2CAudio B2. B2 is fantastic, but it uses a LOT of computer power. I've got all the high-end convolution verbs (7th Heaven Pro, Altiverb, MIR, etc.) but I just find I get better results with algorithmic reverbs (more clarity and transparency). Blackhole and Mangledverb are fantastic for non-realistic sounds.
It still exists and is on the product page via "buy now". Pricing is indeed a bit high, but I found Spaces to be one of the best reverbs for classical instruments. I have also tested 7th Heaven (which is nearly equally expensive) but it did not match my personal taste. Reverbs is always a difficult topic and depends a lot on which sound one likes or not...It seems that the upgrade of space 2 from space 1 does not exist anymore ...