[originalscottyg]

One thing the Exponential reverbs do that Altiverb doesn't, is calculate the early reflections based on the panning of the input, and create different ERs for each output channel of the reverb. This lets you pan into a 5.0 or 7.0 reverb and actually hear the variation in the output. That said, using multi-mono Altiverb and panning into it with some divergence, or using separate stereo instances for front/rear or front/sides/rear can also be equally, if not more, effective. I use both Phoenix Surround and Altiverb extensively.

Also, just got Slapper and I'm loving it.