diffuser or absorption panels, which would you choose?

I have chosen diffusion in the form of artificial Ficus trees.  My room needed help from the lower midrange up.  The artificial Ficus trees, layered sometimes two or three deep, broke up the sound in the room giving only the sound produced directly from the speakers to my ears.  The difference was well worth the small expense. I discovered that the deeper the trees were layered, particularly BEHIND the speakers, the more the impact on lower frequencies.  6 feet deep effectively damped frequencies a little below 200hz.  

And the added benefit was a big increase in WAF. 

The ones I picked up were 5 foot tall models U$60 each from "At Home" home decorating store.  

@soix 

I first saw them used at T.H.E. SHOW at CES maybe 10 years ago.  There is a very prominent high end electronics manufacturer that uses them in his listening room to help control reflections and give him a more accurate reference system.  My room has a lot more problems than his room, so I have a lot more deadening needed.  And that requires MORE artificial Ficus trees scattered around the room perimeter.

I think the effect is more about the number / density of the leaves more than natural vs. artificial.  

I made an error in describing the artificial Ficus trees I'm using.  They are 6 feet tall, not the 5 foot models.