Wow hahah I love that photo, I don't think someone could have children for months simply walking down that hall there!
As for racks, what you want is cabinets (enclosed racks with doors on all sides. Blackbox makes in my opinion the best and you can find one to fit your tastes. Just remember (rack or cabinet) that you need AIR FLOW or you will have problems. (assuming a full populated or even 1/2 populated capacity). That means your rack/cabinet has to be a few inches at least away from a wall or from each other depending how you put 2 together, i.e. in the middle of the room. So 'look/feel/ isn't usualy the top concern in things like this - but rather heat distribution.
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I agree the blackbox racks are very nice. However so are the Hp, Dell, and APC racks. Just make sure they are not just a rack, but a cabinet like it was said. Keep in mind, with a couple full or partially full racks it will be LOUD with all the fans running. To get an idea, maybe visit a local DC. I'll lock em in a closet and make it for networking. FYI.
The Chatworth M Series and the APC Netshelter's are both very nice looking, however having racks out in the open is generally not a good idea, becuase they are very very loud. Also, you will need to have the rack basically in the middle of the room, becuase you need room for the back doors to open.
Now I hate to say this but if this is to show off for customers you may want to go brand name like Sun or Dell, as most customers can relate to one of those companies and think "wow, this place has really high tech stuff!". (Note: I'm referring to interior design clients, not dedicated server clients ).