Shunyata Sigma Analog vs Alpha Analog - Need advice!!


I have a chance to buy these PC for my ARC Ref 6 now:

Shunyata Sigma Analog 20A (100% brand new) = USD 1800

Shunyata Alpha Analog 20A (2nd hand) = USD 645

I have never compare these cables side by side or listen to it before, but I heard about many good things about Shunyata , especially how good it is to work with ARC amp. Since Sigma Analog are much more expensive than Alpha Analog, does anybody has experience to compare with them?  Does  Sigma Analog much better than  Alpha Analog and worth to take it at $1800 ? This amount is expensive  for me, I need to make my decision very careful.                                         

PS:  I'm using a Furutech DPS-4 PC for my Ref 6 now (with Shunyata 15A to 20A IEC converter) , I'm afraid if I choose  Alpha Analog but the sound quality is much different with my  Furutech then I will be regret why not to take Sigma  Analog....Anybody can give me some advice or suggest? THX


mm622
I've compared these 3 x PC yesterday: 

Shunyata Sigma Analog
Furutech DPS-4 (with a Shunyata 15A to 20A IEC converter)
Ref 6 original PC

For sure, Sigma Analog sound best among these three cables, it produce more bass, the bass is more solid and tight.  The sound is more transparency, more details, better analytical and more thicker sound than other two cables. Also it has better textile and 3 D sound stage.

The Furutech DPS-4 is not bad, if I give Sigma a full score of 10, then I will give DPS-4 8.5. But remember the cost of this cable is about USD 465 only, it really worth for money to try.

I really surprise the performance of Re 6 PC, which is come with the per-amp, but sound nice.  Maybe I will give it a score of 7 .5 to 8.

Since the Sigma Analog is completely new, I think the sound should be better after running 200 hours.  In general, I'm happy with the result.
Mikey, I believe I said the old Furutech RHODIUM version was more bleached out, not the Gold. As for outlets? Ps Audio Power Ports, and PS Audio PPP; Synergistic Tesla Plex, and then The Synergistic Tesla Plex SE version; Oyaide R1, and some other Oyaide unit; FIM 880s; Furutech NCFs; Maestro.

And I'm not finding myself overwhelmed by the Maestro. It has a nice sound, but it pushes the entire presentation backwards - on ALL CDs, even if they were recorded closeup (e.g. Mercury Living Presence).  Musically, it sounds just a little bit "off" to my ears, as in not-the-ultimate-in-musicality. I use it, but I've switched out the FIM 880s several times. The Maestro compensates for other components, from what my ears tell me.