Oddly enough, one of my favorite cabs to use is one of a Redbox. I'm pretty sure its from a Tubemeister Profile.
I didn't realize it was a cab sim....of a cab sim, until after I'd come to like it. Kind of a 2x12 V30 sound, but with more bottom end and not quite as much 'honk'.
Well I sometimes switch the filter on the HK to on, but quickly realise it's a different league than a good Cab simulation. That said, with a good room to give it some space, it might not be too bad. But the idea to make an IR of it seems kinda odd to me.