GCode Editor

Frustrated.....

Can anyone recommend a good visual GCode editor, I have searched the web and found many that claim to be the best only most fall very short of the mark. My needs are simple, I design in DesignCad Max 3D, export to .dxf then import in to sheetcam, however I need to add snap out tabs to the GCode. When the file is short this is easy however as the files get bigger finding the correct place to break the line is more time consuming. I would like a editor that has a relationship between the graphic view of the part and the GCode so I can click the line I want and it highlighted in the text making changes easier.

Anyone out there seen such a tool, I would appricated and pointers

Tony