Recommendation for interconnect and speaker cables

Shimdog, I would recommend that you add to your audition list Acoustic Zen's Matrix reference II and Satori speaker wire, both can be gotten at great prices used, and would sound great in your system.

I'd reccomend: Alpha-core, WireWorld or Straightwire.

Siltech Classic LS-88 Loudspeaker Cables and Siltech Classic SQ-28 Interconnects. Siltech cables synergize very well with Krell amps. You will notice a less fatiguing, more natural, and much more refined sound.

Count me another member of the Straley brigade, especially with the optional upgrade OFC RCA's on the IC's. Also, Gregg's speaker cable is even more three dimensional and detailed than the very satisfying Alpha-Core MI-3 (bigger brother to the MI-2) when auditioned in my system which shares no components with yours. Moderate pricing, very high end results.
Audiogon direct sellers, like Gregg, promote the idea of a home listening trial since it all comes down to hearing what you prefer in your own distinctive setup. An additional advantage is that he cryo treats, plus breaking in, his wiring before you get it, so it doesn't take very long to decide its superior character in your system.
I also would like to mention my favorite in the even lower cost category, Audiogon member, Joemazzaglia, who directly sells (and, sporadically auctions) his Auricle Audio Design analog and digital IC's of unique construction. These also reveal their final sonic character in a relatively brief time. Especially when on auction, these wires are his gift to the Audiogon nation.
Both of these manufacturers provide an ear-opening revelation of how very far up the audio ladder one can get at their respective prices.

I really like the Gabriel cables I bought on Audiogon. Plus they were relatively reasonable in price. I think they're only available on Audiogon auction although they come up used occassionally.