Just clip off that stock connector and install a 4-pin female XLR. Then you can use that AC adapter to power anything for which you have a standard power harness that you already use with an SLA. If you need a female XLR, pm your address. I have a bag of them here and I can spare one.
I've heard all the same stuff Bean mentioned about cable burn-in. I've also read articles suggesting that cable burn-in effects are due to charge affecting the the dialectric over a period of time. A lot of people have reported that they hear it in AB tests. I've never heard it myself, but I have never owned a new interconnect. All the good wire I have came out of a working system and then right into mine, so they would already be burned in.
I don't know anything about the silver serpents. There are some really expensive and highly rated interconnects that use silver plated ofc wire in teflon. So just on the basis of material selection, I think marcs cables should be pretty damn good.