Am planning on purchasing a new DAP with the following requirements but I have no idea what the latest greatest is that covers these. All advice appreciated... Must haves in order of priority... Fast and flawless support for 400GB SanDisk Ultra microSD XC - My entire music collection is on this card and it needs to just work without headaches or UI lag shuffling through album or artist view, browsing for songs, etc. I must add I currently have a iBasso DX90 which can read this card but takes forever to bring up the artist/album view etc. Entirely unusable and this is primarily my motivation for getting something new. It needs to work and be lag free with this card. Highest priority! Simple UI - One button random shuffle play of all songs on the entire card or a couple more presses by artist or album - 99.9% of the time I want to just hit play and let it shuffle all songs on the card while I hit the gym. I don't want a high maintenance UI requiring a lot of decision making. Play and go! Good single ended performance - Will mostly drive Noble Audio Savant IEMs in the gym but on the go might also see Beyer T5ps on an airplane, subway, etc. Doesn't need tons of power but I want clean low bass that doesn't feel compromised. Cost - Lower is better. These are for portable use so I really don't want to spend double for that last .001% sound quality I won't hear anyway. Let's shoot for <$300 and see what's available.