I'm looking for two mods:

1) the best for depth of field feature

2) the best for godrays

could you help me please?

Everything you need to know is here

http://www.gamesas.com/index.php?/topic/1082970-oblivion-graphics-extender-thread-13/

is obge's depth of field better than this one http://www.tesnexus.com/downloads/file.php?id=8771 ?
are they compatible or I must first deactivate the other dof mod?

Why don't you ask in the thread? It's there for a reason.

you should look into that too, its a very awesome mod *if u call it that*. i think qarls is a bit different, because i noticed his more at a distance, and i noticed immediate blur when focusing on something and everything around it more blured.