I love being able to rip and store my DVDs for my HTPC (xlobby rocks). And for the last couple years I have been building RAIDS to hold my precious DVDs.
Lately I have changed philosophy and am just using non-RAID raw drives.
Recently I came across a product at my local FRY's that I loved. A SATA backplane that plugs into the 5.25 slots of a case.
view it here:
http://www.cwol.com/serial-ata/4-drive-sata-backplane.htm
I simply love this backplane. I bought a full tower with eight 5.25 slots, put in two 4-port sata cards, and 2 of the 4-drive SATA backplanes, and 8 - 320Gig SATA drives.
Approximate cost break-down
SATA Backplane (at Frys) $130 ea.
SATA 4-port PCI card (zipzoomfly.com) $60 ea.
320Gig SATA HD (zipzoomfly.com) $140 ea.
Total cost for 1.2 Terabytes: ~$750.
Total cost for 2.4 Terabytes: ~$1500.
Of course you can use less drives, there is a 3 slot backplane for around $100, and you can get drives from ebay for very cheap if you are willing to take chances.
Essentially I now have 2.4 Terabytes of active in pc storage. But actually it is unlimited as the individual drives are easy to pop in and out, and hot-swapable.
Harddrive storage is now so cheap, I rip to harddrive exclusively, and keep a list of what movies are on what drive, with a master list. When a drive gets full I just pull it out, put it on the shelf, and stick in a new blank drive.
When I want to watch a movie from a shelved drive I just plug it back in. The SATA backplane drives are hot-swapable, just pop them in and out.
I also keep certain movies on certain drives, for example I have all my Samurai movies on a drive - all the Zatoichi's and Lone Wolf and Cub series. All my TV series such as Farscape, Bob Newhart, and Inspector Morse on their own drives, and so forth.
I have a master movie list that tells me what harddrive a movie is on, and it takes a couple minutes to pop in the correct drive.
But with 2.4 TeraBytes you can have a lot of movies available. And with 300+Gig drives available for under $150 adding more quick storage is easy.