Sorry but I disagree sir.
I do think that you need to stick to wide-screen format (if you buy a wide-screen)
But I'm running my 23" Samsung considerably below native with no issues whatsoever.
Native on mine is 1920 x 1280, I'm running desktop at 1280x720, and matching it in AH.
(no I'm not running the Hi-res in AH even though my system can handle it)
Everything is clear, crisp and there is no discernible difference between the 2.
Interesting enough I just took a screenshot of my desktop, with this page up, a text file open, etc.
Considerably more fuzzy in the screenshot than it is live. Text is fine on the desktop, but in the screenshot of that same text it was fuzzy.
Go ahead, buy the monitor, hook it up, don't be afraid to try running it at a lower res than native.
Your mileage may vary, but I'm guessing it will still be many times better than it was before.
Ohh and I paid 200$ for this 23" Samsung at Sam's Club in October, and they still have it at that price.
Great price for a nice monitor in my opinion.