I realize that 50-75k is a moderately expensive system, these days, but it's STILL a huge chunk of money! I'd put 5k aside as a travel budget and go to several dealers (don't forget manufacturers who have in-house systems or who sell direct (PS Audio, Magnapan, etc). Listen and choose based on YOUR preferences and tastes. Remember reliability and brand history!
At that price a dealer should offer home set-up and/or exchanges. Choose 1 source at first, listen and judge, again, by YOUR taste. Keep 10k aside for longer term changes.
If you're not sure your ear is discerning enough, you shouldn't be spending this kind of cash until you are!