yea bro, the sound quality will be amazing. Theres a review on headfi if youre looking for a professional's comments (http://www.head-fi.org/products/massdrop-x-hifiman-he350) but theres a lot of terminology you wont understand unless you're really deep in the audiophile community.
anyway
the main things about those headphones are:
1. its open back, so you can hear everything around you + the music, which some dont like ; but the first time i listened to a pair of open back cans, i loved them. Its like having a soundtrack on top of your life. You can have a normal conversation without having to remove em, its really enjoyable.
It has been such a vibrant time in the Massdrop landscape, as they have been able to create successful collaborations with respected manufacturers. Massdrop and AKG with their smooth sounding K7XX. Massdrop plus Fostex with their richly immaculate TH-X00. Enough of a success to spawn a new TH-X00 variant that contains Purpleheart earcups, and delegating the old model to a new name: the TH-X00 Mahogany, to be able to differentiate between the two models. When I had a chance to listen to the new collaboration with HIFIMAN headphone, I jumped at the chance and feel honored to be considered. Thanks to Christian, aka @CEE TEE, for the Massdrop x HIFIMAN HE350 in exchange of my honest opinion. Also, congratulations to his new job with Massdrop as Audiophile Custom Products Manager! Much success to Christian and thanks to @WillBright as well, bringing those who purchase Massdrop's audiophile products along the journey with you both, one person at a time.