Any advantages to bi-wiring speakers vs. single

Usually it is well worth it. I can't speak for your speakers specifically but the several pair I have owned over many years have mostly been bi-wire and each of them have appreciated it. It also adds the freedom of bi-amping which opens up even more thrilling options. Plus, there's no harm done with the extra terminals except for the bit of extra $$$. Go with the bi-wire.

My Von Schweikert VR8's sound much better bi-wired.

Thanks so much for all the terrific help.

I would ask your dealer if you could borrow both to determine whether or not you want to biwire. I've never heard a difference. My ears are probably hosed.I've found that single wire is normally a larger gauge and sounds better than the equivalent bi-wire (which is usually much smaller gauge). I run Audioquest Rockefeller which is pretty thick twisted pair cable. The batteries last for years.

Biwiring must depend on the speaker brand...Alan Yun told me NOT to biwire my Silverline Preludes that he designed...he said they would be "less coherent". I biwired them anyway (yeah man...a rebel!), listened, put 'em back to single wire, listened again, and discovered he was completely right in a big way...they sound MUCH better single wired. He da man.