Suggestions for Cables all with Krell

I'm looking for suggestions for the best cable combination with Krell gear. I have a Krell 500i, 300cd which I use for two channel. If anyone has good suggestions for power, speaker, and interconnect cables, I'd love to hear it... but I'd also like to know what you like about the cables and what expect when listening to them on Krell gear.

I currently use Cardas Neutral Reference speaker cables and have an Audioquest Viper ballanced interconnect between the 500i and the 300cd. I'm not too thrilled with the Audioquest but it does sound better than "free/give away" RCA cables. Suggestions please..