i know this is delayed..
but using a Linksys router instead of netgear would be a wiser choice.. as linksys is a division of Cisco, and cisco are pro's when it comes to networking..
for the 5 pc's, you could do as i have done with my small network,
buy the router and hook it to the modem, then get yourself a 4-12 port hub/switch (12 port switches are more efficient, but both will work) plug the switch into the router, and that way, you have already given yoruself plenty of room to grow, and you have the ability to access the router from any machine, this and you can always add more switches to the router..
as far as data storage, build a small machine with multiple harddrives (2-3 should suffice, with the main OS on one drive, and al lteh data you need stored on the others, this way.. if the OS on the machine fails.. you won't loose your data or cause youself extra work, as you jsut reinstall and go), instal radmin and then share all drives, this allows you to control the pc without a monitor, keyboard, or mouse and also allows anyone to store information onto each drive with relative ease..
my 2 cents