There are two other candidates, Chaffetz and Webster. Why has Boehner postponed election? Because his anointed one bowed out?
Boehner has got to go. There is no reason for postponement.
Once the chair has been vacated a Speaker pro-tempore can be appointed. (I'm uncertain as to the procedure and I am researching and reading the House Manual)
The only conceivable reason for Boehner to postpone election is because his anointed candidate has dropped out.