Thanks Mapman, for taking the time to respond. I've been somewhat out of the loop regarding Ohm Walsh speaker model progression. So I must admit that I'm not familiar with models 100S3, or 5S3. I would only guess that those model upgrades are the predecessor to the x.x000 series of upgrades.
I've been so happy with my 4's all these years, that it's only been within the last few years that I have taken up the interest again, in speakers, that is.
About a year ago, or so, I had John design and build me a 3000CC custom center channel. I say custom because it's mounted from the ceiling with the driver being inverted 180°! After trying a couple of different center channel speakers over the past decade, I decided to speak with John and see what he could do for me. I am very pleased with the results.
I listen to a lot of multi-channel music, and for the first time the forward sound stage has a timbre match that is much more seamless (I should have done this long ago)!
So, I'm excited and hopeful, that the 4.5000's will be a very noticeable audible difference.
Dave