You cant go wrong with the IP6000, we use it in house.
But like Mr. Landis mentioned, the snom Meeting Point is a very good option as well. I find the snom to be much easier to use and many customers prefer its aesthetically pleasing design.
What makes this unit unique is the ability to daisy chain units together to expant range in a large room, but it also extends control. Pressing mute, menu etc will replicate across all chained units, making them almsot operate in some form of "Borg Collective" (Reference for my Trekkies out there )