The only other tool we really considered was Crimson Hexagon. Sysomos' user experience was so difficult to grasp that we didn't get very far, I probably spent at least 3 entire work days trying to set things up and understand what I was doing with Sysomos and it wasn't happening.
Ultimately, we loved the insights Crimson gave us into our audiences, but their access to Facebook conversation was limited and it doesn't pick up sentiment right away, you have to train it, and training a topic took several hours. It just wasn't realistic for us to take several hours of set up before running a topic. You can run a topic without training it, but we were already used to having sentiment given to us right away with NetBase, so losing that feature was hard for us to do. I would still consider Crimson in the future, as the tools are always changing for both NetBase and Crimson.