Horizontal spacing - choir

[Carl-Henrik Buschmann]

Hey,

I need advice on how to best typeset my SATB score. The problem revolves around horizontal spacing. 

http://lilybin.com/15a0y9/2

I feel it is a bit cramped and the breaks do not flow naturally. What can i do to improve?

In the source you will see what i have already attempted. Perhaps those attempts are the way to go but the eyes of the crowd usually works wonders.


Best,
Carl-Henrik