Booming bass from WP6

It's probably true. Your room is too small for the WP6. A speaker that size really needs room to breathe. I wonder how the cubs would sound in there though. Small rooms need small speakers. I doubt that any full range floor standing speaker isn't going to come off sounding "boomy".

Iujona, in the long run it might be cheaper and more effective to contact rives http://www.rivesaudio.com and see if the room can be fixed up enough to allow you to keep a really good pair of speakers. It would be a shame to see you see the WP6 if you didn't absoluely have to sell them.
I have talked to Rives and they really know their stuff. The room makes soo much difference in how the speakers sound. Usually fixing the room is the cheapest option.