After fermentation has ended, is it ok to let it sit in the fermenter for an extra week before moving it to the bottling bucket and bottling?
Absolutely ok. 1 week or even longer is fine. Waiting is generally a good thing in homebrewing. Rushing things can be _bad_!
As long as your temps are stable and the fermenter isn't disturbed you can actually leave it in there for quite a while. I was listening to the Experimental Brew podcast and they mentioned leaving beer in their fermenter for several months with no issue.
The yeast still has a lot of "cleaning up" to do after fermentation, so the extra week on the yeast is almost a necessity if you want your beers to turn out better.
