IP PBX Suggestions

Hi – we currently own a trixbox Pro CCE appliance and have been fairly pleased with this IP PBX for several years now. But recently we have been hearing quit a few negative things about Fonality and their IP PBX – trixbox. I was wondering if anyone has any recommendations on other alternative IP PBX’s systems that work similar to the trixbox Pro CCE appliance. Features we enjoy is the flexibility of this phone system and its easy to use GUI interface, with HUD features. The one thing we don’t enjoy is the Annual support every year and the cost to purchase additional user licenses. :frowning: Your suggestions are greatly appreciated.