I'm not exactly a subject matter expert on djenty tone, but I do know that one of the key secrets to getting great tone from Guitar Rig is to either tweak the hell out of the new studio mixer in version 5, or use external IR's. As far as amp models, the Van51 and Hot Solo seem to have the right 'stuff'. I've gotten tones that reminded me of Meshuggah with both of them. I think I have a few Pedalboard2 patches where I use GR5 for amp and effect models running into Peavey ReValver III.V for its awesome IR loader and tone controls. It's pretty sweet being able to simulate speaker distortion.
Ask enough questions, and you can answer anything.