Amir has done the reviews (use search to find them) and Staticv3 has offered to provilde links to the manufacturers, should you need assistance there. I don't see what further information you think you need but don't have.I use google translation but the problem is that Amir has already carried out a lot of tests and I would like to collect (have the links) his best Amplifier-dac tests so that I can analyze all this and finally make my own choice.