Those pasar malam's DVD's DTS tracks are fake one
Jack sparrow just re-encode it from the existing DD5.1 track, some even is from 2.0 track
So it's not the real DTS you're hearing, it's just re-encoded DD5.1 with higher volume.

Some ori DVDs has real DTS, especially those special edition or the so called DTS edition.
Most of the hollywood studio's movie DVD are release in DD5.1 only, only a selected fews are encoded with DTS. Even my LOTR:EE trilogy also are in DD5.1 only. Anyway, DTS DVDs are easily found in playasia or yesasia

I haven't seen the price of BR movies yet, but so far what I seen is the price of HD-DVD movies are the same with normal DVD movies. So it's still quite affordable. Wonder when Georgie will release a HD version of Starwars: Complete Saga. Woot!!

Just drop by any hypermart like Carrefour, Tesco or Giant, you can see all sort of chapalang brand DVD players with 5.1 output (consist of 6 outputs) selling for only RM100++ only.
My cheap Philips DVD player also got it