@pops - I can't speak for the Shunyata Omega speaker cables yet, but I can compare Shunyata Sigma to MIT 2C3D Level 2: Both cable lines are excellent, but I think they go after separate things.
-Very open sound, nothing particularly stands out to me, but more or less I think everything is "there" and clean sounding
-Explosive! Incredible amounts of detail that I never thought were in music I've listened to since my childhood, also surprising (for me) considering this is analog output. I would have been expecting this from a change on a digital front (e.g. DAC). Brought new life to my system.
To date: I am leaning heavily towards MIT Cabling, even more so as I am looking into Spectral amplification. To my ears, I appreciate and love the details + surgical precision.