I have customers that still have 15" monitors (believe it or not), so most all of my existing apps are designed around a maximum area of 640x480. All new apps are designed around a 800x600 though and customers must upgrade their monitors. I don't like scroll bars on forms, and neither do most of my customers. I think you have to look at the hardware of your potential customers as well as their preferences.
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"When the debate is lost, slander becomes the tool of the loser." - Socrates
Vita contingit, Vive cum eo. (Life Happens, Live With it.)
"Life is not measured by the number of breaths we take, but by the moments that take our breath away." -- author unknown
"De omnibus dubitandum"