M&K S-125 or S-150?

The S-125 was the speaker system I wanted to own back in the day...and I haven't really delved into surround sound since then. Now I'm back and am trying to decide between the S-125 (LCR) system and the newer S-150 (LCR).

Aesthetically I like the S-125's...they are slimmer and will look nicer in my HT. The S150's look (for lack of a better word) boxy, and you can't get the stands for them either.

My question is are the S150's really that much better sonically? I'd be willing to sacrifice some aesthetics for superior sound...but only to a point. Also looking at the S100b's. The S-150's and S100b's seem to be more available at the moment...so that's also a consideration.

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Will be using a nice Arcam pre/pro (AV8). Why do you suggest an active speaker?
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