Motorola Solutions (the enterprise network and public safety side of the split) also makes a really good enterprise wireless solution. I like the LiveRF function you can get on some products. If you have a floor plan with AP placements, you can generate a live heat map of your coverage. If you also use their integrated WIPS/WIDS system, you can also do live spectrum analysis, wireless forensics (you can actually pick out a wireless client and watch the history as it moved throughout a location moving from AP to AP), and a bunch of other useful diagnostic tasks.
disclosure: I work for motorola solutions.