Hi,   I'm looking for a sub $100-$150 DAP with the ability to play cue, 16/48 flac, has good sound quality and a decent battery life. My headphone is audio technnica A900x. I mostly listen to jazz. I can't decide among these IHIF I770C/ Hifiman HM-700/Fiio X1. I'm open to other suggestion...

Has anyone built this? Look interesting though. I'm thinking about building one for my Audio Technnica W5000.   http://www.ebay.com/itm/141448142658

Both are NOS DAC which have a lot of positive reviews. I'm planning to buy 1 of them.    with the Lite DAC AH, I'll do the passive mod and fix the voltage Cost: ~$180(ebay) + $40 (poly cap) = $220   the TeraDak v3.1D is $250 on ebay     Does anyone has an ideal which option...

My current setup: jRiver plays lossless music > Gamma2 DAC > Bottlehead Crack with speedball upgrade > Beyerdynamic T90 I mostly listen to Jazz. I want the sound to be relax, smooth and musical. What should I upgrade/get? My budget should be < $500