I am looking at setting up a NAS as well although primarily for audio. I am looking at Synology DS models and the Drobo N5 using Western Digital Red 3.5" drives - 2 or 3 TB size ($115 - 170 per drive). There is a lot to figure out and I don't have any concrete answers yet. One of my main quandaries is how big to go with drives... If 3 TB is good today, how much money do I want to invest when 10 TB is probably just around the corner. No definitive answers. Wish I could be more helpful but I'm still searching. Good luck.