Short wide screens are a PITA for things like Word and Excel.
Why?
Look at your menus, for one. They only take up a small portion of the width of the screen unless you have really started customizing. This is wasted space at the edge.
And what about the title bar, you really need it to say "Foo.xls" and have the rest of your 1920 pixels wide just sitting there displaying a blue bar with a grey outline?
Bottom line is, it all depends on what you use it for the most. Games and movies, sure, pay less for 1080 vertical. Office work? You may want more pixels, regardless of where they are put, but not in something with an aspect ratio not geared for it.
One interesting combo I had not too long ago was simply rotating a 17" display to go along my 20" display. You ended up with one monitor perfect for word documents and the other as your main desktop.
Now, with 2x1600x1200 LCD's, I am wondering if I want to get a 1920x1200 from dell, or if that extra 20% of desktop will really be worth giving up that desk space and STILL having 2 DVI cables and power lines running under my desk.
16:10 is fine so long as they do not skimp on the actual horizontal space.