Allow me to PUSH for a hybrid. VOIP isn't really 'there' yet and the hybrid will give you the best of both worlds. That said, any locally supported brand, esp. 'with good references', will serve you.
Not in any particular order: NEC, Panasonic, Mitel, Avaya/Nortel, Comdial, ESI, Isotec, and others that aren't mentioned because I'm 65. (That's my excuse and I'm sticking to it) The major thing is local, RELIABLE, KNOWLEDGEABLE support. Try checking with your peers at other law firms.
Get references. Ask to see systems, that are being proposed, in operation. Don't hesitate to insist, it's your money and 'they' want it. Don't make it easy, make 'em work for it. Remember, it'll be your rep (& maybe job) on the line here, take your time!
