The upgrade path proposed is nothing more than various levels of thickness. Just like audioquest, who admits that the best bang for the buck is the type 4, 15awg for $200. Not much different than Kimber, except that Kimber's chosen geometry has a true purpose for long runs.
On a budget, between easy pay for less copper and the good old fashion pure copper 12awg figure-8 or twisted at less than 1$ a foot, it make more sense to go with good old fashion. Skip the upgrade path and go with heavy gauge for peace of mind.