What's up, it's been reported that the HTC 10 uses Qualcomm Aqstic integrated DAC https://www.qualcomm.com/news/snapdragon/2016/06/02/qualcomm-aqstic-sets-new-standard-audiophiles along with a good amp, it's always a hard choice seeing as though new phones will be here in a few months but that doesn't mean they will be better in terms of audio as a few device have taken minor and major steps back, the HTC 10 may not have a dedicated DAC but it sounds great, boomsound does shape the sound though and has built in audio profiles which is just an Eq imo, on my streaming apps I turned off all equalizers and normalizers and in Poweramp no eq or tone control I just used the built in profiles at the time, the amp pushes hard out of the box but can get louder or lower depending on the profile setup, it sounds very musical and exciting....a more modern sound if you will where certain frequencies are boosted, can it compete with phones with dedicated DACs in terms of overall quality or satisfy audio purists? Probably not but pair it with some decent headphones and it will have you head bopping all day, compared to my x800 it's not too far behind just missing some details and smaller soundstage but the x800 sounds slower and more neutral, sorry I'm not an expert at describing audio lol but if you want to wait for 2017 maybe get a x800 to play with in the meantime? They start around $150 on AliExpress but bear in mind though you can root etc it runs EUI which is far from stock Android while the 10 is closer to stock Android....The 10 already has Nougat and is a very good device overall plus another HTC flagship will be in the $600+ range unless you can't find a deal at the time.
EDIT: I've been wondering about the low price and did some reading on Amazon and it appears its the real deal, you still have the return policy just in case there are defects however the phone will have no warranty outside of that.