You could also take a look at CamBam for your CAM program. It has both 2D and 3D machining strategies and these can be freely combined within the same operation. File imports are dxf, stl, raw, 3ds and gcode itself for backplotting, so it should work well 'straight out of the box' with MoI for 3D work, but I'm sure MoI also has a utility program somewhere that will allow dxf files to be produced from its drawing data and that means you could use just the two programs for all your CAD/CAM work.

Some example work here:-
http://www.cambam.co.uk/forum/index.php?topic=897.msg4755#msg4755 and here http://www.cambam.co.uk/forum/index.php?topic=751.0

Martin.