After many months of saving a few dollars each week, we finally saved enough spare change to buy an external 27" LED Monitor. Its a Samsung 27" - 1920 x 1080 resolution @ Best Buy for base of $269. Base price because taxes and environment impact is added to this sale price. I've been using this 27" LED monitor on my work Laptop for the last few hours and its been amazing. With this size of screen, I can do large spreadsheets, split MS Word documents and other split screen applications viewing. re: Accounting system on the left and MS Word document on the right. Amazing large size.
I now go back to my personal iMac 21", HP Laptop 17.3" and Asus laptop 15.6" and these smaller size screens seem way "too small". For these small screens, I have my glasses off they still seem too small.
If one is thinking of getting a larger screen for their fixed desktop system, do investigate the 24" or even the better 27" screen. Their selling prices for 27" are now affordable... For my Work system, the 27" LED is worth it (even paying out of my own pocket).