Just a thought, 3 clients... you might as well run a standard hard drive or two. Running 2x 1TB drives will let you do client backups to the server + mirror all of the server data, and most likely cost less than one SSD. Heck you could probably Raid 5 3x 1TB drives if you needed more throughput. Plus, with only 3 clients running to a server off 1-2 GigE ports, an SSD probably isn't going to make a huge difference.