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Snowman,
First of all the Metro is not as noisy in the cockpit as many other TPs. Like the MU2, BE99, Merlin, etc. Yes, a good headset is important. I have almost 3000 PIC in the Metro and enjoyed every minute. It does make you work and makes you a better instrument pilot. But if you know its limitations, it will do everything you ask of it. You don't need to sweat fuel like a 1900. I have flown a couple across the North Atlantic, one non stop with only an extra 1000 pounds of fuel.
As for a headset, I used the Telex ANR with the full muffs. No ear plugs. With the DC 10-40s with super muffs, I had to use ear plugs. But with the Telex, I could hear people talking in the back.
As for the tail droop. I never ran across it unless you exceeded fuselage bending weight. I found that you had to taxi at least one foot straight ahead before stopping to ensure that the doors opened and closed without damaging the door seals.
I know Sportys has a flip chart set for the Metro and there is a company that makes flip cards for it also. But these are mostly for recurrent folks.
Good Luck