What is a good budget DAP around $100? I just want a dedicated DAP that sounds better than my current phone. I have shortlisted 4 DAPs - Fiio M3 Pro, Fiio M7, Shanling Q1, Hiby R2, and LG V20. Are there any other DAPs I should consider? I heard there are little, if any, sound differences between various DAPs at this price. Is that true? If that is the case, Fiio M7 seems to be the best option as it has the best battery life. I will be only using it to drive my easy-to-drive IEMs and Koss KPH30i.