I dont know what prices you are getting... But the 900 you are talking about is for the thier 16TB version. and the 4TB is much much cheaper than this...

I believe this version does not mean to be installed in very high usage production environment. ITs LITE, its just a flavor of their system. Get 2 versions of LITE back them up, and what else u r looking for?? If you are looking for a SW that last so long, support (I blieve their forum guy is been asswering all type of technical questions not just how to install, and upgrade..etc) and come in a cheap price and is upradable.. Will this will be in different earth, not in this earth.. everything have pros and cons...