FUSE Question...Very Confused Please Help !

That brings up the question: which fuses sound best?

@kraftwerkturbo  Search in the Forum, a number of threads on different fuse brands; and there's no universal answer - preference

That was an (unsuccessful) attempt to be sarcastic (audiophiles often floating in higher spheres discussing effects of power cables, plugs, electrical ground, etc). 

The obvious (against sarcastic) answer is: real audiphiles replace any fuse with 6 inch nails that have been cooked in double extra virgin oil with vinigar for 2 hours and then powdered in pixel dust (the mega pixel variety). 

@rocky1313 The 250V thing is an arc-over rating and nothing else.

For US operation you'll want the higher amperage rating as opposed to overseas operation.

Typical line voltage spec is ±5%. 110 x 1.05 ≈ 115. 

120v has been the US standard since 1967 🙄

120 * 1.05 = 126. 

126 volts is  ≈30% power increase into 110v transformer resistance [which will increase a little from excess power dissipation]

Check your mains voltage and get written certification from the manufacturer that the unit is 120v nominal rated. Insurance companies can be sticklers.