Agreed on the Audio Sensibility. The Signature Silver interconnects (either XLR or RCA) from Audio Sensibility are probably the best you can do. That is if you want silver. I used to own these interconnects before I moved to OCC/Rhodium. My cousin still has a pair of the Signature Silver XLR and they are hard to beat. Actually, I could build these cables myself if I wanted to, but it would cost just as much to get the wire/connectors, so it's a really awesome value for the money!!
However, I would suggest you avoid the lower end Impact and Statement series as they use stranded conductors. You’ll do much better with something like Wire World or Audioquest. Keep in mind that silver has it’s own double-edged sword and can sound too bright/sterile/harsh on a system that has too much resolution. It’s a fine line balancing act.
For power cords, I agree that getting $1,000 plus power cords is a total waste of money. Most of them use stranded conductors, which in my testing always results in sound that is not as good (phasing issues and solid-state sounding). I shy away from silver or silver-plated solutions as well.
If you are willing to DIY, I usually get a used Audioquest NRG-4 cable and chop the ends, then put on Furutech FI-28(R) rhodium connectors for IEC/Male. At the used prices today, it will come to $450-500 USD for a power cord that will beat the crap out of most other cords in the market. The Audioquest NRG-4 uses all solid-core OCC type solid-core copper conductors (4 x 19awg for hot, 5 x 21awg for neutral/ground).
What many people don’t realize is that the connector plug accounts for half of the sound quality of the cable. The stock NRG-4 cable sound nice and it has a very solid sound, but the gold-plated connectors will impart a warm sound with rolled-off/recessed highs. If you are budget constraint, you can even use the cheaper Furutech FI-11-N1(R) series or even go down to the Cardas 3455R connectors.
For interconnects, I hand make all mine using braided 20awg solid-core OCC conductors and Furutech rhodium XLRs. Speaker cable is usually a double-run of Rocket 44/88 with Furutech rhodium spades. (two runs of Rocket 44/88 would be a 10awg speaker cable).