The Big Green, Sorry if the guys came across a lil abrupt, I think it was mass confusion that is to blame for this
Basically it all depends on how low you want to go, the lower you want to go the more you are going to have to mod your bed floor
IMO it is less usable to have bump in them middle of your bed, unless it is rather small & then you wouldnt want to slide any sheet rock over it & it would make it hard to slide anything very far in the bed
The picture of the blue truck with the raised floor is at the extreme, I am not laying frame with my truck & only needed a 6" Z on the rear of my frame, so I am only loosing 6" of my bed & that leaves it about 12" deep
So since you like your truck as a hauler, you have to decide how much of your bed you are willing to loose & if its none, that ok too there are plenty of trucks with no notch that look just fine
IIRC this is my old truck aired out in the back with no notch (if you notch it, youre gonna have to cut your bed floor one way or another)
This is close to where the bed will set on my new truck with a 6" Z'd rear & I am currently raising my bed floor to allow for this