Mate, you are probably over thinking here; understandable, though! 😊
If it is Bianca - Bella Barrista!
If Vesuvius - Direct from Paolo of ACS
You can’t go wrong with either of these. Both are excellent machines, as we advised you before.
If you feed the machine with good water that won’t scale or significantly reduce the risk, and give the TLC she deserves, she will serve you very well for a long long time.
I am sorry as I am not sure if you mentioned anything about your water situation. We can’t emphasis more than enough than by simply advising you to sort this before getting a new machine.