I have one very modest system. To me a reference system is someone else's setup. If it were mine, I imagine I would have to have several homes, audio rooms, 3 or 4 decent setups to call one reference, one that is the most balanced, neutral, not necessarily the most enjoyable but the one that would appeal to the largest audience.
The obstacle though is, even if I have unlimited funds, I would make my one system the best. I don't know why I would have a 2nd system in my home?