Can anyone confirm for me how much of an upgrade, if any, the RTiA3 line from Polk Audio, would be over the Focal Sibs from JM Labs? http://www.crutchfield.com/p_107RTIA3B/Polk-Audio-RTi-A3-Black.html?tp=186 http://www.crutchfield.com/p_107FXIA4B/Polk-Audio-FXi-A4-Black.html http://www.crutchfield.com/p_107CSIA4B/Polk-Audio-CSi-A4-Black.html?tp=189 I currently have the Sibs and was originally looking to just upgrade the center but now that I've been reading all of your your posts its making me speaker crazy so I'm trying to get a rough "baseline" based on what I know, which is pretty much just the Focal Sibs at this point. The Polks seem to get great reviews everywhere, but are they going to be an upgrade for me or just a lateral move sideways, in which case should I wait and save up for more? http://www.amazon.com/Focal-Black-Home-Theater-Speakers/dp/B005IFWZ5U/ref=sr_1_2?s=electronics&ie=UTF8&qid=1349624028&sr=1-2&keywords=focal+sib Gene and some others were quite helpful in suggesting that Paradigm would have been the best match with the Sibs to replace just the center but it looks like getting into a full set of Paradigms might be getting a little above my budget. Any help greatly appreciated, Thank you, Cliff P.S. Is an Onkyo TX-SR507 enough receiver to push the Polks ok?