Any one tell me, about "Samsung 40'' UA 40H5100" LED TV

[Tech Info]

DTS sound is good? This model is coming with DTS studio sound

i dont know about this model, but yes dts sound is newer and it is better than dolby digital.further dts 2.0 downmix means The devices can output both Multichannel(5.1/7.1) and a downmix to 2.0
where downmix means mixing multiple channels and producing stereo output.(eg 5.1 to stereo).
Hope this helps..