bugman,
What are you referring to when you said brackets for $59.99. I thought the WB-1 bracket works for all ProMedia. If you are referring to the speaker stands, I went with the Radio Shack ones because I didn't want to pay shipping cost for heavy items.
I just got my WB-1 brackets and it's a lot cheaper than any of the universal brackets I've seen in the local stores. It has a clean and simple design (not vertical adjustment) but serves it's purpose for less than $30.