Hi Blake,
I did think about running 240v.
Distributing 240v definitely mitagates resistive loses. But that assumes that the comparison to 120v is done with the same wire gauge.
The advantage of 240v is that you can use a smaller wire gauge then 120v and have the same resistive loses. That saves money both in material costs and labor (wrestling larger wire gauges you would need for 120v takes more time than smaller ones). That’s one of the reasons 240v (and sometimes much higher) distribution is often used in commercial buildings… it just saves a lot of money.
Also, 240v volt wiring is, well, just different. Typically it is done with a round cable with four conductors in it, a red and black for the hots, a white for the neutral, and a green or bare for the ground. The conductors are stranded to make it easier to work with.
I don’t know how this kind of cable construction affects noise and power in general. However, stranded cable, in effect, produces more surface area which allows noise to travel further on the wire without being diminished very much. Higher frequencies travel only on the surface of the wire, not on its interior. So I would expect this kind of cable to be noisier than sold wire cable.
So deciding on 120v vs 240 v is actually complicated 
I decided to use 120v for my home runs for few reasons.
One was that I just didn’t think it would make any difference in my power amps over what a good power conditioner running on 120v would do. Also most modern amps, like the M500, have gobs of capacitance in their power supplies to handle transients anyhow.
Another was surge suppression. I want everything to have surge suppression. Of course I could do surge suppression on 240v, but it’s easier to just get a conditioner that has integrated surge suppression. Also I feel surge suppression must be next to the equipment it is protecting… so called “whole house” surge suppression just doesn’t work for electronic equipment.
Also, even though my M500s could run on 240v, none of my other equipment does. So there would be more home runs for the other equipment, and both a 120v power conditioner and a 240v conditioner.
So, in the end, I just didn’t see any practical advantage to doing 240v home runs. I, of course, may be wrong on this but my system sounds very good as it is, running on 120v.
But don’t let me dissuade you from doing 240v home runs. Using 120v was the result of my view of how things work which might not be correct.
Dan