Your rebuild speed will be limited the write speed of the added/replaced drive.
If you want to pursue copying data to disks as suggested, you can remove your SSD and boot from the new drive (just install ubuntu live cd on part of it) or a USB ubuntu cd.
He can boot from a USB stick to do it, or boot from the new drive. Can use a HDD dock for the new drives. Etc, etc... No point in trying to pick apart the suggestion until OP posts specs.
OP doesn't list his MB so it's hard to say but 6 is a common number of ports. Personally, it'd be worth it to buy a cheap PCI-E SATA card. Or, copy data over the network to his desktop which likely has more ports free.
I would never purposefully rebuild my array 5 times to expand it. Why not open your case and plug in two 4TB drives temporarily to copy the data off. Remove all the 2TB drives, plug in all the 4TB drives. Build your array with the remaining 4TB drives (3), copy data over, add the remaining 2...
the 2407 doesn't use the VESA mounting holes on the included stand.
There are reasonably priced single arm VESA mounts that will clamp onto your desk instead of requiring holes.
If you buy a modern Dell 32" screen there is a chance that it will have the same tabs as your 2407's stand in case...
I just got this the other day.. but it seem to give me some eye strain. I put the brightness down to ~40-50 and upped the refresh to 72Hz but it still seems to flicker for some reason. My previous monitors are Dell U2407 and U2408's which caused no strain. Any one have similar problems with...
Buy something like this: http://www.amazon.com/gp/product/B003P2UMQ2/ref=wms_ohs_product?ie=UTF8&psc=1 and then plug your pc into the master.
Ahh, just read that you watch TV on them too.. nevermind this won't help you.
Don't know about hardware either, but syncing is a bad way to back up. Real backup software will let you save versions and protect against accidental deletion. Most will let you backup to a NAS or an external drive, some for free. I use Crashplan (locally and online, different sets of data)...