To sub or not to sub, that is the question.

[Swish]

Keep the sub Swish. It increases the overall headroom of the system, and allows your amps to run easier by not having to reproduce the deep bass in the main channels. In reading the measurements in Stereophile, this speaker performance under 80hz practically begs for a subwoofer to accompany it. There is no way it will handle the bass from the L/R mains, and the LFE as well.

You could run them full range and still keep the subwoofer on the LFE as another option.

Thanks for the input and technical info. I'm going to keep the sub and do as Mr. Peabody said, keeping the mains as 'large' with the sub connected.