Todster,
The latter is the right way to biwire, because the main reason to biwire is to separate the highs and lows. I should not that I was not biwiring. I was simply doubling up 4tc to increase the aggregate gage of my wire.
2chnlben,
I am happy with my homegrown audio silver lace, but if I were to buy a new interconnect today I would try something with Eichman plugs. I have not tried them, but their principle makes sense. There was also a recent discussion in Audioasylum for an interconnect without connectors, which seemed very interesting. The idea was to attach the negative wire with an 0 ring.