Mobile Suit Gundam - The Witch From Mercury!
I bought it on ototoy.jp and it's available in 24-bit 96kHz FLAC. Other than being available in the best format, I can confirm it is WELL produced and great for anyone with a good speaker and/or headphone setup (Currently listening to it with a FiiO K5 Pro + Grado SR80X.)
It remains my top anime of the year and at this point the best soundtrack of the year as well~