We've used a whole bunch without any complaints, EBS, MXR, BASS Witch, Tonebone, Aquilar, SansAmp and we have happy customers using all of these and Providence, Catalinbread etc. etc. and various studio channel rack modules.
Basically if it sounds good, use it, and if it has integrated speaker emulation, that function must be bypassable to allow the CAB to do its thing.
Andy