Unless you really need that much fast storage for video/professional editing or what not, I recommend most people just go with a NAS and with a decent sized SSD for all their programs/OS.
This gives higher availability (mirrored/RAID drives), easier backup for everyone in the household (everyone stores stuff in their home directory) and you can even access it wirelessly with your cellphone, etc…
I guess if you have a ton of games, then maybe you do need a bigger SSD.
