Thanks @rifmon and the rest for posting your impressions, and kudos (I think
) for the EX upgrade experience-sharing/encouragement!
I really like the S2's (w/RAALs) as an upgrade to my 5.1 system a few years ago. I replaced the L/R's in my system with the S2's and wow, I was impressed! I had an older Pioneer Elite integrated receiver rated about 135 w/ch. I listen to a lot of 2.1 music, and really like whatever 5.1 music I can get my hands on!
...but I digress...last year, I did a major overhaul of my system...and moved from an integrated receiver to a pre/pro and separate amp. So, I can't speak to changing just one variable, and I don't know how much difference it makes, but my amp is Class D 400 w/ch into 8 ohms...
Not sure if it is the upgraded pre/pro and/or the "ample" supply of power (sorry for the unintended pseudo-pun), and I am not an expert reviewer, but the S2's "breathe" now, "effortlessly". My immediate impressions on the upgrade were significantly increased dynamics even at low levels, with increased sonic detail. It could be a higher quality pre/pro, increased power, better power, or some combination...but personally, I am sold on "there is never too much power" as far as (decent) amps go...within reason, but not limited to the specs of the speakers. Perhaps a quality separate amp with less power would perform just as well, but it's one variable I didn't experience...as they say, YMMV
The only reason I haven't upgraded to the EX yet, is I am soon to go to RAAL Towers for L/R and Horizon C with the S2's "relegated" to surround duty...and do the S2's "need" to be upgraded for surround duty?
...and I know "need" is different than "want"