How much storage are you looking for? I personally like Snap appliances, but they are pretty expensive. I was going through the same dilemma, and decided to build a Shuttle box with Windows. For me, it's an all-purpose server, so it's a better solution than a NAS. You will find that the consumer-based products are all pretty slow, and all have their little quirks. I have never tried it, but there is a little Linksys device that has 2 USB ports that you could stick whatever size drives on. Beware of anything that requires a "client" to be installed on the PC. That defeats the whole purpose, in my opinion.