PADS, not Expedition here, but a couple comments on the thread:

PADS does have an optional MTHSD package for interactive matched length routing.  It works pretty well, some minor glitches (being corrected).  It's not full auto, but more likely you want to interactively route anything matched anyway.

IMHO, 3D modeling in PCB programs is for marketing, not design.  Will the mechanical designers working on the enclosure for your board use the PCB program, or MCAD?  My preference is to use software for it's intended use.  The IDF export into Solidworks is quite effective ,I generate very complete and accurate board models for the mech team, we work on mechanical constraints and interferences in the MCAD software.  Of course, returning that work to PADS isn't as easy.  I would prefer that the ECAD vendors put their 3D efforts into more seamless integration to the IDF interface than pretty 3D pictures in ECAD software.

Pete

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