With the news of both SGA and Williams being out, you might as well let JB sit again and rest up that hand some more.
I don't know, I am starting to get concerned that the starting unit has not had enough time to play together lately. I see a benefit in having the unit out there. If Brown really needs rest, of course rest him. But at this point, I would rather see everyone who can play actually play.
In the last 12 games, the starting 5 have only played as a a group in 2 of those games, and only for a total of 42 minutes. I suspect that is probably the case for most if not all the top team but I think it should be a consideration.
[Edit: I figured out how to check this. It appears that no team has fewer than 2 games with their starters over the last 13 games.]