FWIW, I used v3.0 for awhile and went back to v1.5 because 3.0 seemed like a RAM hog and bogged my older machine down quite a bit (1.5ghz single core processor, 1.5gb of RAM). Functionally, there were a few things that were nicer on v3.0, but I didn't perceive the essential functions of the two versions to have much difference...although I could be wrong about that since I'm not a power user.