Agree with MusicFellow that the Omega's are superb. In comparison to the Sigmas the Omegas are more articulate, more dynamic, even lower noise floor, without a hint of veil or haze. The are not colored, but faithful to the signal.
My local Nordost dealer brought over a complete loom of Odin and compared with my loom of Omega. In less than a couple of minutes, he shook his head, packed up his Odins and admitted the Omegas were superior in every aspect of sound quality. Importantly, the speaker cables were downstream from (a) Omega interconnects and (b) Sigma power cords attached to an Everest with an Omega from Everest to wall outlet, i.e. the Omega speaker cables had an excellent "signal" to convey.
With respect to the need for a consultation with the Altaira, this is to determine which version of the device you need and to insure you fully benefit from the unit. Richard, at Shunyata, is extremely friendly and helpful, will not "over sell", but rather knowledgeably advise what is best for your system. I implemented his suggestion and certainly benefited greatly.