Where did you use your nokebook alway? Indoors or ourdoors? If your nookebook was more like a desktop for you, a larger monitor should be necessary.
Flatron W30 is a dedicated monitor for notebook and netbook by LG. LG Flatron W30 have a high dynamic contract ratio up to 30000:1 and more larger size than the monitor integrated into notebook .
Now 18.5″ W1930S and 21.5″ W2230S respectively are priced at 270000KRW and 310000 (about $229 and $263 )