Shadorne, I happen to agree with the OP.
While everyone talks about first reflections, which is true, what most people miss is that damping the room between the speakers has a lot of benefits as well. The OP's idea to experiment cheaply should be commended. Key word is _experiment_.
Pillows, throw rugs, etc. Put some down between and around the speakers on the floor and you can really tamp down brightness and reveal detail. See oh, a dozen of my previous posts on the subject. :)
One key reason to try this is most people don't think about it. It's counter-intuitive, but we do perceive "loudness" as an integral of input over time. This is among the most worthwhile experiments and cheapest experiments an audiophile should do.
Best,
E