Yup, I found AlternateGotNo3D was much closer than Franklin (I was trying to match the subs on the SE LDs). Franklin has round Os whereas Got has the straight-sided Os, like in the A NEW HOPE part of the crawl (I've since discovered that the crawl font is Univers, but GotNo3D is still a better match for the subs). Impact was also fairly close, and has the advantage that it comes with Windows.

I'm definitely not close to being an expert, but I presumed the DVD subtitles were just defined by the DVD player as my DVDs vary based on where I play them, on the computer they look woeful.

Subtitle streams are encoded as a series of stills, so they should look the same whatever you play them on. The most interesting use of subtitles is on the Ghostbusters commentary - enabling them puts an animated shadow of the commentators on top of the movie, a bit like MST3K.

DE