I know I’m going to break @smcgathyfay’s heart here, but… the GF office is standardized around Illustrator and Inkscape, and they are much more used (according to our customer survey so far) than CD, so if you don’t have an allegiance, I’d have to recommend AI or Inkscape.
That said, it won’t be hard to go from CDR->GF, it just may not be quite as smooth (e.g. we have no plans for an integrated plugin yet, so it’s an extra step).