I like both #4 and # 6 but would prefer a different font, something less rounded. Do like san serif though. Also, how would #3, which is my preference, reproduce in black/white?
The triangle symbol in #46 might connect with the "A" which is an important letter in our name. It stands for Abilene which is the city we primarily serve our audience. I wonder how it would look combined within the wordmark or standing in a more stable position as the abstract mark.