There is not much more to do the floor, basically, just pull the seats. You may not get much more out of doing it, most of the road noise is in the hatch and doors, but for the extra hour or so, depending on matierial i did.
The other thing is depending on the tires on your car, i found, as have a few others, the tires on the sport package cars are loud. when it came time to change them i went a different way from stock and that made a difference also.
I just went through your album; that is hands down one of the most involved and detailed work I've seen done on a Z interior.
I am planning on having my doors and trunk dynamated but I read up some post where some guy complained about earing front tires noise now. Based on your experience, is the leftover noise from doing just the trunk and doors that bad? If so is it much involved doing the floor board?