i think tl space is great!! if you have it with mp toolkit or something where it is virtually no cost, compare it to
mcdsp revolver
audioease altiverb
audioease speakerphone
wizoo verb was nice, not sure if you can still purchase it?
waves ir1
sir has tons of latency, altiverb has a lot of latency. both over 6000 samples of latency.not sure about ir1. tl space has virtually none. i load my own impulses i make or others like bricasti and recab all the time. the controls are very logically layed out as well.