Your specs are more than enough, according to all the research I did.

One possible caveat: I was researching for Final Cut Express. When working with high-resolution video you work with a low-res copy in real time and save your edits as a reference movie. Then when you render it applies your edits to the high-res source.

See "reference movie" here for more -- http://www.dvcreator...gh-quality-movie/