I am trying to finalize a decision for a mixer for a podcast. I have narrowed it down to Alto 802 vs Allen & Heath Zed 10 vs Yamaha MG12XU. I have ruled out Behringer, Mackie, and Alesis because of numerous negative reviews about their reliability, and feedback from forum responses. My primary concerns are sound quality, functionality, and reliability. I don't think that effects are too important because I will be working primarily with vocals. The podcast will have up to 4 people at one time. USB in and out is essential. I also need aux ports for mix minus for Skype calls. Anyone with experiences with these three mixers or similar? Which one would you select and why? Thank you very much for your help. I am new to this type of audio equipment, and could really use some insights about these brands and particular models.