Biwire with different cables?

I have done it both ways and both worked. I think much as you do, the central point for me is that the task is different for the wire carrying the bass signal than the higher frequencies. I am not a great fan of anitcable, especially on the bottom end. I would try a much heavier wire, or make one yourself. Take some magnet wire, which is similar to anti cable and use 6 or 8 strands twisted around each other with a very slow twist. Blue Jeans cable looks promising also but I haven't used it. There are arguments on both sides of this; I would just try something else on the bottom and see what you think.

Or very, very bad; depending on taste and system. The magnet wire I mentioned is available for about 60 cents a foot so experimenting with it is cheap. There are two schools on using the same wire, one holds that you can optimize the wire for the task at hand, heavy wire for the bass and thin for the upper frequencies. The other is to use the same wire for both. I would probably do the latter out of an unwillingness to spend time experimenting except that I don't want to spend the money right now duplicating my Cardas Gold Reference . Even Cardas doesn't use the same thickness of cable for jumpers as it is. So I am using double runs of OCOS for high end. I was EXTREMELY reluctant to spend big money for long cables so I tried several cheaper alternatives including anti-cable. None was satisfactory IN MY SYSTEM. EVERYTHING you can conceive of has been recommended one time or another by someone. One web reviewer uses romex and insists it is better than any exotic cable. So I would try inexpensive alternatives or ones that can be returned first and see what YOUR impressions are.