So i got a new led tv. Samsung 8000 60" and realized theres two different options to audio through my 5.1 samsung home theatre system. Its either i use PCM or DTS NEO 2.5, dts neo 2.5 seems louder but my rear speakers arent loud and with pcm i can use matrix so all speakers work equally but its not as loud. Whats the differenct betweem the two, and whats best for gaming, watching hockey and movies?