Happy to report my new Samsung SE-506BB Burner worked well out of the box. Plug and play drivers through Windows 7, and a drag and drop for the Blu-ray folders and files. At 2x (6x possible), it burned in just over an hour.
Verbatim BD25-R, about $2 ea. All 20 or so audio tracks are recognized on the disc, plus about 6 subtitle tracks I added. Tested the disc in my Sony BDP-S390 and it plays flawlessly and looks great...........All the chapters are there and not a glitch in sight. TSmuxer does a great job prepping the files for BR.
Now for a menu..............which can wait. This disc will hold me for quite some time:)