ACE 3000 should work very well for you as there are many other people who design panels and use ACE to perform the conversion. The other nice thing is that ACE provides "editing" so you can many any last minute changes (or fix anything) before exporting to gerber.
Numerical Support Team
I have played with the program just a little but am finding that it is all you claim to be it looks very promising for our needs to convert silkscreen panes in DXF format to Gerber.
As you can see, the graphics and text are very minimal but we need the quality to be great.