I'd run the Sim I3 into the Loreleis (great, under-appreciated speakers!) and try the subs w/them too.
I'd stack two lovesacs, because from the little I've seen about them, I'd working on the assumption that your ears would be pretty low relative to the tweeters sitting on one. If that's not the case, please ignore that suggestion.
Are we still having fun? Or you planning to jump on my case too? Cheers,
Spencer