The best way to figure this out is to download the manual for the monitor off the manufacturers website. Nvidia does indeed include flat panel scaling in their driver options, however it doesn't always show up and tends to break from version to version.
FYI my dell 2405(not 2407) doesn't have pixel scaling in the menu, but my planar 21126w does. The samsung 245b is cheap because it uses inferior TN technology which has a quick response time but bad viewing angle and generally bad colors. The dell is a MVA panel which has a slightly slower response time but a better viewing angle and contrast. The 245 was designed to compete with cheap brands like Acer and KDS.
I'd buy the dell if I was deciding between those two brands but also checkout the LG and BenQ 24 inch panels as they get very good reviews.