Hm...I can't seem to find an 8 wire Horus on the EA page. I emailed Eric and he informed me they were no longer upgrading the Horus, but referred me to their Thai distrubutor. However, they said the price would be 62000 THB, which comes out to around 1950$. Seems kind of expensive for an upgrade.
Does anyone know how much a new 8 wire would cost? Just so I could get a rough estimate should I decide to sell my Horus and get the 8 wire.
The 8-wire Horus was never offered as an standalone product - only limited upgrades from the 4-wire variant. The upgrade is expensive because the Horus in-and-of-itself is an expensive cable. When going from 4-wire to 8-wire, you're essentially buying a whole other Horus to braid into your pre-existing one. So obviously, you'd be paying the price of a whole new Horus plus the labour required to construct an 8-wire cable. Even if the 8-wire cable were available standalone, it would make more sense to go for the upgrade regardless.