What others modelers do you use for work besides SketchUp?

[Ecuadorian]

Just curious to know what other 3D modelers you're using to get your work done. Not experimenting or playing around, but real work.

How much does it cost?
How do you work from CAD drawings?
How do you apply textures and render?
Do you find its workflow efficient?
Can it import/export to SketchUp, and how clean are the results?
Could you post samples of your work with it?