We recently upgraded from a KuroBox to the LinkStation 1TB. It's perfect for sharing (including iTunes) and backing up files from all of our computers via our home network. It's a significant element in our home entertainment setup since it can be modded to run media center (XBox 360) compatible software, allowing us to play our media through the Xbox to the TV. It's fairly quiet and consumes little power. Also, it allows you to access your files anytime via web browser from anywhere, handy that.

The LSlive v2 is nearly identical to the KuroBox Pro but significantly cheaper since it comes with the drive. However, it isn't quite as easy to mod as the Kuro because you have to pull the drive and boot from a live cd in order to repartition it.