I had gone with a test servers support where I need to provide a server storage solution for office which as around 50+ workstations. They work on a kind of data hogging app which needs better storage solution. Now the client is ready to invest nicely on this. I recommend to with SBS server + attached NAS. But before giving any final confirmation I need more idea on what storage solution are available right now. It is much better if everything is hooked up. What you called a branded system. I do not want to go piece by piece and build up everything. A ready to use solution is much better.