I did own the ps1000 and was very unsatisfied. I returned it and purchased a SVS pb-1.
For moves the ps1000 did an ok job. It rumbled when it needed to. But on music I thought it was horrible. I'd buy the pw2100 and try it out. If you don't like it return it.
I know I'm glad I didn't settle for the ps1000. My pb-1 blows it out of the water.