Well I still have the same speaker cable but have added the lamm 2.2 hybrid amplifier in the place of the rowland 302 amp.
I am still in the market for a speaker cable and lamm recommends purist, kubala, nirvana, silversmith, and cardas. I might go with cardas because its well respected and the least expensive in the reference series.
I have tried the valhallas but not with current equipment. I simply don't have the cash nor the desire to spend even used $3,500 for speaker cables (which the valhalla would cost used). I am going to budget $2,000 for used cables through audiogon. The trick is which one is best for my system and the mid-range and vocals is now stunning so just want a speaker cable that might tighten the low end somewhat. The nordost is tight but a little lean. The lamm has very good bass but not as tight as the rowland was.