About subtitles: I didn't think about them... could you provide them, if they are on the BD and/or DVD? I could try to extract them from the laserdisc CC, but until now I have not find a working software that could take them from the captured video and save as text.

For the extra and commentary subtitles: my english is good, but I think I'll be not able to transcribe an entire commentary and extra features... here, an external help MUST BE provided!

If I'll release a BD25, I think to add the original PCM soudtrack (just converted from 44.1KHz to 48KHz); obviously, I will add the AC3 soundtrack too. For the commentary, maybe 448kbps DTS is not needed, as a lower bitrate will be enough, but I'm open to every suggestion.

About video bitrate, I usually use 7000 or 8000kbps for AVCHD, with pretty good results; for BD, I think 15000kbps will be enough for the movie and the alternative ending, less for the extras.