BI,
Sounds like you are getting the info you need. I would recommend focusing on 3/4 deads or I think what these folks are calling trap bar deads. I have been a long time proponent of doing heavy full deads but reciently, last 2 months, switched to 3/4 deads. Result has been awesome. I have notice a huge change in my physique that was not there before.
Instead of getting thicker muscle in the trunk I have started to actually taper without losing strength. Granted I probably do not pull as much as I did when I switched but the results are still great. I have sufferd from a thick waste all my life and I know now that a big part of it was my lifting routine.
Good Luck,
Gig