Best convolusion plugin for guitar modeler chain

I've been very impressed with SIR 2 lately as I've been testing the Recabinet impulses in development. I actually think it's the best software for this, even better than Altiverb in terms of feeling realistic.
 
How's the latency on it? I've tried Perfect Space and Pristine Space on prerecorded tracks, and they sound incredible...but teh latenzy!!!!!

excuse me....did u read the manual of voxengo´s pristine space???:
u got options to configure........:rolleyes:
IT works for me and is a great plug:Smokin: