I have had the AI 3, L1 and Melos Sha Gold B, the Melos has remote control,is balanced, and has a great headphone amp built into it and overall just sounds better. If you have not dealt with AI just wait, their customer service is nothing to write home about. My experiences with all three units was very good. Te Melos folks are located in Las Vegas, Nevada.
I preferred the Sha Gold B over the other two.
I preferred the Sha Gold B over the other two.