EzraS --
For about the same money as the Super 3i plus stands, you can get the Super 3S -- which goes deeper. I've got them mated to a Dared 2A3C integrated amp, sourced from a Marantz player, and the sound is absolutely beautiful. My musical taste is quite eclectic -- lots of classical (symphonies to string quartets, and everything in between, including opera), classic rock, jazz, 'world' music, new age, even some country -- it's all there.
Furthermore, you might consider putting the speakers on the 14' wall -- that way you could separate them more optimally and also position yourself more optimally from them -- just a thought.
Anyway -- best to you -- and Happy Holidays.
Ciao.