Stevizzy, I found a great deal on a Nordost Valhalla Balanced XLR IC (use with Cocktail Audio X40 and Electrocompaniet CD 1 UP), very fast, accurate, sounds full, deep and wide at low volumes, (scary good real, when you crank it), the Simaudio and Sopra's respond very well. For speaker cables I use Silnote Poseidon's. Great value for the money, they sound great in the system (punchy, fast and clear, with a very musical bottom end, complex mids and silky highs). There is noticeable system synergy that is awesome. The 700i and the Sopra's really work well together.
It took a while to get the right pieces and cables, the payoff has been well worth it.