I use speakers of a similar impedance (Silverline Preludes) with AQ Type 8 speaker cables...also a couple of pairs of Diamondbacks and a 60 wpc Jolida JD502P amp that is inexpensive, sounds amazing, and has plenty of power. A very even tone all around, and I found the Diamondbacks to be a really neutral well made cable.
Warm Replacement for Adcom GFA 545 II
I recently upgraded speaker cables and interconnects in my system and it revealed harshness of the Adcom. My system: JM Labs Daline 3.1, Jolida 5t (upgraded), Moon 100 d DAC, and Apple Airport wireless. Cables are Audioquest 8 cv and Audioquest Diamondback. The brass instruments became too harsh and fatiguing to listen to. I listen primarily to jazz, vocals and classical. I would also consider an integrated amp and replace the Jolida. I have no particular budget, but do not want to spend more than would make sense in the context of the overall system. Thanks very much for the advice.