I just brewed a dunkel today as well. Pitched it on the yeast cake from the hefe I just bottled. I've done a dunkel before and just went 2 weeks in primary and straight to bottling. It turned out great. I don't think a secondary for a week or so is going to do much but drop some yeast out, and I kinda want that yeast in the bottle...
The main thing is keeping your temps down while fermenting...and use a blowoff tube.
Primary: Zombie Dust clone
Brewing Next: Jamil's Evil Twin, SN Celebration Ale clone, Russian Imperial Stout w/ bourbon soaked oak chips
Kegged: Zombie Dust clone, Centennial IPA