Best in breed

I bought every SIP client I could get my hands on, and this had by FAR the best audio quality of anyhingt. UI also top notch, though I liked some qualities of Bria slightly better. No comparison though as Groundwire was a far better sound according to everyone I tested with -- sound quality was the final determinater, no regrets.

discoveringnewthings about Groundwire: VoIP SIP Softphone, v2.3