Power supply AC cords: any reason to upgrade?

In 10 audio's review of the Ares, he notes some minor improvements with use of a PS Audio AC-10 cord, over a DIY cord. He doesn't comment on the stock cord, unfortunately.

I currently use an AC-10 on my Ares (coincidence; I had it before I read the 10-audio review), though I haven't performed direct comparisons yet. I will do so when I get a few nicer cords to play with soon. Having owned a few Ares over the years, I can say that you're going to get a lot more mileage out of the following upgrades, vs. a cord upgrade:

• Blue Cinemag SUT if you're using an MC cart. The Bob's Devices Sky is slightly better than the 1131, which is similar to a 1254. The difference of any of these, over the stock red 3440, is significant. If you do go for an outboard SUT, the interconnect between it and the Ares is crucial (and keep it 0.5m long).
• Roll NOS tubes. Telefunkens are a very good 12AX7. Mazda silver plates are even better. You can use 12BH7 in the 12AU7 slots (cleared with Rogue).
• Get the Magnum upgrades. If you have an outboard SUT or run MM cart you won't need the 1254, but you'll still get audible benefits from just the resistor, PSU, and cap upgrades. 

@john_g
No, you wouldn’t want to stack an internal & external SUT. Rather, you’d bypass the internal SUT (i.e. run in MM mode) in favor of the external SUT. Of course this only makes sense if the external SUT is of higher quality than the internal -- and enough of a difference to overcome the extra interconnect and noise pickup potential.

BTW I've accidentally stacked an internal & external SUT and the result was actually too little gain. The 2nd SUT presents a very heavy load to cartridge, and you lose most of the cartridge's signal before it even hits the 1st SUT.

The blue Cinemag they put in the Ares Magnum is a 1254. It is excellent, though there are some incremental improvements to be had with a Bob’s Devices Sky CineMag and excellent cable -- but it’s not nearly as big as the 1st jump from a red 3440 to the blue 1254 or 1131. Since your Ares is Magnum’d you’re sitting pretty good there.