dts 2.0 never worked for me. my amplifier wont properly decode it, as i always only get a stereo output. even blu-ray authors say that dts 2.0 can create problems at the end user level, like i have.

best option is to simply stay pcm for 2.0 (incl. matrix encoded audio) sources. file size is mostly not even relevant. pcm ensures the highest compatibility.

btw, if you use .dtshd files with tsmuxer/mkvtoolnix make sure to add a -21ms delay. you can also add the delay in eac3to and then you can add the new .dts in tsmuxer/mkvtoolnix without problems

this delay only applies to dts-hd files. normal dts core can just be added without any delay.