I like Bob over Holtby.
I don't think Holtby is a #1 NHL goaltender. I'd try to move him.

Find the owner of Neuvirth.
That's your ideal trade partner.
You give him goaltending security (or so it seems).

Both Neuvy & Holtby are RFA this year.
There is no guarantee that either or both are re-signed.

Washington needs a serious boost. They are 5th last in the NHL in SV%.
Perhaps they splurge on a free agent goalie: Mike Smith? Viktor Fasth?
Perhaps they bring in a veteran Russian: Khabibulin?