I'm using the Reference 3a De Capo i speakers on 28" Skylan stands in a small room (11 x 16). These speakers are partnered with a Blue Circle BC-3 tube pre and Simaudio W-3 SS amp. I'm very pleased with the results at both low and high levels. I think that you'll get better results with the De Capos if you have tubes somewhere in your audio chain. I haven't heard the 2 other speakers which you listed.
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For more info about the De Capos you might want to also check out Circles -> Owner Circles -> Reference 3A
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For more info about the De Capos you might want to also check out Circles -> Owner Circles -> Reference 3A
.