I have a Gartner report from last year (sorry not allowed to share it) on WIPS. You hit the main one's with the exception of Aruba. Aruba bought Network Chemistry who had a solution generally regarded as being one of the top tier. The are currently integrating it into their product line. Pretty much all of those vendor's are up there with basic features it just a choice if you want easy to use (Airtight), lots of bells & whistles (Moto) or vendor integrated (Cisco & Aruba).