Have you heard of that new service that allows you to connect to the Internet at one gigabit-per-second to access your very own two terabytes of storage space? Me neither. That's probably why you need the Asus TS Mini NAS.
The HP MediaSmart EX490 and EX495 are the new top-of-the-line Windows Home Servers from HP, which are good enough to pretty much be the de-facto Windows Home Servers on the market now. These new units keep up the tradition.
Jason lurves Windows Home Server—it does automated backups over your network, streams movies, music and photos and is a general-purpose fileshare. If you don't wanna hand HP $400, Maximum PC's got a build-to-stream guide to rolling your own.
The previous HP EX-487 Windows Home Server was notable both because it was a good WHS, and because it had the ability to support Time Machine over the network on Macs. The EX490 and EX495 do even more.
The Gadget: HP's LX195, their stripped-to-the-core (but Apple Time Machine capable) implementation of the Windows Home Server, which comes with a 640GB internal drive, but can only be expanded via the four USB ports in the back.
Acer's Aspire easyStore is on the cheaper and smaller side of pre-built Windows Home Server configs at $400, but unlike some at that price, this little cube actually has three hot-swappable HDD bays to expand its 1TB of storage. Full specs: