I use HT Pro-Silway Mk IIs with my 508.24 and throughout my system. I also use RCA because my preamp is not balanced. The Pro-Silways were a significant improvement over the other brands I tried (DH-Labs, Audioquest--middle range, and kimber select). If you can use the balanced, though, go for it. I've heard a lot of comments similar to that of 7671 above.
k
k