First off, you should be r

First off, you should be referencing the quality of your video through an external monitor. Computer monitors do not accurately display video.

Second, I know Final Cut doesn’t like really big images, and 5616X3744 is friggin huge. If you’re working in an SD timeline, you’re images only need to be 72dpi with pixel dimensions that fill 720X480. If you’re going to zoom into the pictures and do some panning and zooming, then they should be 1440X960.

Finally, what format are you rendering out to? If you’re trying to save for the web, export a Quicktime encoded with the H.264 coded. DV-NTSC looks like crap on a computer screen since it meant to be viewed on a TV.