Moose89,
If you are getting the Ares II used and for a great deal, it's a really good DAC for the money. The internal DAC in the Node 130 (3rd generation) is much improved over the 2, and 2i versions, but the Ares II will be a very noticeable upgrade.
SPDIF refers to the topology of the signal, and usually comes in 2 flavors: digital RCA (digital coax) connectors, or optical The Node 130 has both coaxial RCA and optical SPDIF digital out connectors, so no problem connecting with the Ares II. NOTE: The digital RCA cables are not the same as RCA cables used for analog audio interconnects.
If you later want to upgrade any cables at a reasonable cost: Lavricables, DHLabs, Zavfino, Morrow Audio, and Supra Cables (actually found on eBay) all make great cables and have many affordable options.