Dave if the thought of spending all that money on an ip pbx when you do not know what the return would be like why dont you either try one of quintum tenor range to act as a stepping stone to a full ip pbx. This way you would “feel the quality of VoIP” without the huge cost.Then you could move on to a true ip pbx like the Swyx platform.
Best Regards
David
dwray@blue-lava.co.uk