I dont believe that is what he is saying. I think E34R1017 means that its the same process to install new parts as it is old parts.
You dont HAVE to get new struts, but i would highly recommend it if you got the originals. you should have left over money too if you budget is $3000. i spent about $2100 for everything, struts, lift coils (AC lift), OEM hardware, wheels, tires, WARN manual locking hubs and i think thats it. i installed the back with a friend and had my mechanic do the front coils...
so you can use the extra cash for CV's (because 1 is eventually going to fail), skids, maybe rockrails?