Hi, I've used AutoCAD, ArchiCAD and Revit extensively over the last ten years since graduation - my overwhelming preference is for ArchiCAD - it and Revit do much the same functions in terms of 3D modelling except ArchiCAD has a much more intuitive graphical user interface.

It's remarkably easy to place a desired window in plan, and immediately view it in elevations, sections, schedules etc.

I personally wouldn't bother with 2D drafting any more (AutoCAD or Microstation).

Thats my recommendation.