What is your question? If you are looking to by a self-standing unit from (e.g.) Best Buy or Walmart, I don't think I can help you.
We own around 800 DVDs, and have a library. In it are about sixteen units, with each unit containing between seven to ten (from top to bottom) shelves. The shelves range from 24" to 48" in width, and from 9" (for books and CDs) to 15" (for LPs, three-ring binders, etc.) in depth. All of the shelves are adjustable (meaning that the shelves from top to bottom can be just about any height), and are made from .5" plywood. We will probably never run out of space.
I own a few Mission Media Storage cabinets and like them alot. Mission also makes some larger cabinets which would probably work pretty well for you (although with a collection your size, you'll probably need 3-4).
Brad: You forgot to ask your actual question...but HERE'S an entire thread on transferring collections into thinner cases...doubling the capacity of your existing shelfing/storage.
Thanks, guys. The question was vague but I was wondering about shelving. I'll be moving my video stuff into another room soon and will have two walls to place some shelves. They have to be stand-alone (not bolted to the wall) and can go from floor to ceiling which is around ten feet. I think that conversion to slim cases is also in order.
Lots of capacity for relatively small footprint, it's freestanding, very stable, and turns easily even when packed to the brim. The shelves are adjustable to store a variety of media. I've seen a bigger version of this too, with a 24" x 24" footprint.
How much room do you have? The Boltz units don't take up as much room as you might think; mine only project 10" into the room (counting the floor molding) at the feet with the shelves actually closer to the wall.
The pictures don't do them justice; I thought my wife would hate them but we chose the Anthrocite finish which suits out theater room quite nicely.
Mary, love those spinners! A bit pricey, but I'll have to look into something like that.
Right now, I have a cabinet (over) filled with DVDs. And several stacks of storage boxes. I wanted to try to unpack them all into some sort of display case but couldn't find anything that took up as little space.
Just remember to leave enough room around them to allow them to turn. Ballpark figure is 1.5x the width of the unit, so for the 18" unit, allow approx 27 inches.