[sf-lug] directory tree organization question

[jim]

    i have a number of directories, each with their 
subdirectory trees. 
    i just bought (and will very soon pick up) a new 
laptop from zareason (Terra HD). 
    i'm rethinking my directory structure and can't 
decide (it may not matter, but it may--i bet that 
someone figured it out in 1969): 

----------------------------
what i've got looks like this: 

this/sub-1/
this/sub-2/
this/sub-3/

that/sub-a/ 
that/sub-b/ 

----------------------------
i can re-do things like so: 

this/sub-1/OLD
this/sub-2/OLD
this/sub-3/OLD

that/sub-a/OLD 
that/sub-b/OLD 

----------------------------
or like so: 

this/sub-1/
this/sub-2/
this/sub-3/

that/sub-a/ 
that/sub-b/ 

OLD/this/sub-1/
OLD/this/sub-2/
OLD/this/sub-3/

OLD/that/sub-a/ 
OLD/that/sub-b/ 

----------------------------

i have no inclination either way. opinions?