Wmf, eh? I've never thought of that...I should give it a shot. How does it do with crummy, old blueprints, sepias and mylars?
Our GP4's generally run around 300k - 1.2MB and if we need to modify them, they're brought into AutoCAD and manipulated by Raster Design. It's a little time consuming, but it works well. We have many hybrid files, where 'AutoCAD' or vector lines and text, etc has been drawn over top of the raster.
I dunno...What else?