Try Extricom - the inventor of 'Channel Blanket' technology. Nothing tops their performance and stability. Have installed all from their 8port system up to 32 AP's system with aprx. 600-700 users connected. Just worked and performed like a charm...
BTW - Meru is a 'software based' vendor of 'Channel Blanket' tech. - that is trying to deliver what Extricom does on HARDWARE basis. Haven't hear anything bad about Meru though - other than some certain performance limitations... Extricom would be a bit more expensive in start-investments I believe....