I'm finally upgrading my old Windows XP desktop system and am looking for recommendations on a new desktop computer for a stand alone user. I'm currently running AutoCAD Architecture and do limited 3D renderings (primarily Sketchup). I'm also thinking about purchasing a laptop to take in the field with me. I had my last system custom built and spent way too much on it - hence wanting to get as much use out of it as possible! Are there any recommendations on new systems? Thanks!