Amarra sounds really, really good. Pure Music is good too. They are different, in that Pure Music, to my ear, is a little more neutral/clinical, and Amarra is a little more full bodied/leaning on the smooth side. The nice thing about Amarra is that it uses the same Sonic Studio Engine (meaning the digital processing math used in the software is the same) as Soundblade , which is the DAW software that an awful lot of what we listen to is mastered with.