To your question about CAD.
I have just tried QCAD and very impressed by it. Almost like working on the real AutoCAD. Had almost no problem with the installation. The trial version only runs for ten minutes sessions and shuts down. I am paying the full fee of $26 to get it activated fully.
Had no problem opening files from my existing AutoCAD, dwg files. Did not get chance to import MicroStation drawings but someone told me that they had no problem with it.
I am also using Quanta to do my site that i had started with CoffeeCup and it seems to be working just fine. Had too many problems installing Bluefish so gave up on it. If someone can tell me how to overcome some of the dependency issues, i would love to try it out.