Recently added a Paradigm CC290 v.5 center channel replacing a CC170 v.4.
A big improvement. Dialogue is dramatically improved. Much more clear and a much wider range of sound as well.
I had the 170 sitting atop the plasma on a shelf with two back "legs" supporting the rear of the shelf sitting on the credenza.
I put the 290 on the same shelf and realized this is a very bad idea. The 290 has to be at least twice the weight of the 170 and I was very worried about damaging the tv by having so much weight sitting on it.
I attached a shelf to the wall for the 290 and am much relieved hehehe. It also looks much better.
Here is a recent photo: