Ouch... Yeah I am kind of on the fence, for one of my machines, about purchasing the Apple Cinema Displays. Ideally on one of the machines I was considering 4 x Cinema Displays, but I like to have a clean setup. I do not want cables stretching and laying all over the place. I do not like introducing extensions either.
It amazes me how Apple could not offer a removable cable for the mini-display port, USB, and power connector. I mean it would make so much sense so you could order the length you need, in addition ordering it without the power connector if you do not plan to use it with the MacBook Pro.
p.s. I really like MonoPrice