Best MFT Pancake Lens for Shallow-DOF Portrait Photography

[anthony5429]

What is the best Micro Four Thirds pancake lens for shallow depth of field portrait photography? I'm about to get a GF3 and am wondering if there's a pancake lens I could use with it which could take a shot like this:



And what if I'm looking for a lens under $500...

 

[kundalini]

Probably the 20mm is the most used. The 17mm is another option. I have the 45mm and it works well, but it is a bit tight for shooting distance.