I had a chance last night to directly compare Scarlet Letter Blu-ray from BitWel with my Korean R3 SE DVD both playing through Oppo BDP-83. Guess what, the DVD had better PQ. I had forgotten how good upconverted DVD can look. The DVD had just as much detail as the Blu-ray and without the occasional combing artifact, heavy DNR, and edge enhancement that's on the Blu-ray. The Blu-ray picture is very similar to the recent Once Upon a Time in China trilogy from HK with similar DNR and edge enhancement.

Given how the picture looks, I also have my doubts about the lossless PCM track that is on the disk. Even though it's 5.1 PCM track, I suspect that it could just as well be lossless encoding of lossy 5.1 DD track on the DVD.

In conclusion, if you already own a good DVD copy, it makes no sense to "upgrade" to these cheap Taiwan BDs from BitWel/Shengchi. However if you don't have the DVD, then these may be the cheapest way to own these Korean movies.

Try

dvd.jsdvd.com

it's region free.
NT$299 = US$9.0