on wall, axiom, SVS, HSU

IMHO, you'll have to spend a heck of a lot more money to do better than SVS. I have both 5.1 and 7.1 SVS systems, the 5.1 system using all SBS-02s except for the SCS-02 mid and PB12NSD sub. The 7.1 system uses the STS-02 slim towers as mains, an SCS-02 mid, SSS-02 side surrounds, SBS-02 back surrounds, and a P12NSD sub.
Both systems sound incredible. I did tweak the top end EQ on both systems from about 8K to 16K, +1.5db, for my personal taste and just to open up the top end slightly. To reiterate, both systems sound fabulous without any tweaking whatsoever, but I just like to hear the "shinnnnggg" and overtones of the acoustic guitars, mandolins, banjos, and other acoustic instruments. And I get that in spades with both systems. Like I said, just a personal preference. Both systems reproduce very accurately and are tremendously transparent. After a month or so of listening to both systems I can't recommend SVS highly enough.
A word of warning...if you like your sound system baseline sound very colored look elsewhere. SVS is well known for producing highly accurate speakers. I prefer a speaker system with a highly accurate, transparent, and flat baseline so that I can take it from there, if necessary. That way I'll have a point of reference...a baseline for comparison. There's absolutely nothing wrong with wanting a "colored" system, one that emphasizes lows, mids, or highs to an extent. It's all personal preference. I prefer as accurate of a baseline as I can get...or afford. SVS will get you there, for much less money than most. At least that's been my experience. Just an extremely satisfied customer...no connection to SVS.


Tom

As with all comments, even mine, take them with a grain of salt as only your ears can judge which is best. You have to decide if you want a direct radiating speaker for the job or a more diffuse/enveloping sound. Once you have this set you can decide on speakers.

I like a more diffuse sound so I recommend the Axiom QS series. They are highly touted as one of the best surround sound speakers available, I have a set and love them. They offer a very diffuse sound which is what the speaker arrays in an movie theater do, only you use just the 2 speakers instead of a few for the side surrounds.

Emotiva also has a multipole surround speaker it maybe worth a look. I have never heard it and the one review comments to it being better than the Axiom QS series.