My preference is a single pair of speakers, but I'm willing to do whatever I need to to solve the problem. The carpentry isn't a big deal to me, so cabinet complexity isn't an issue (I've built a pair of Fostex based back loaded horns and some self-designed bookshelf monitors). The corner horns have the most appeal because they meet most of my requirements. However, the falter in that they don't allow for compensation of room interactions. So, if I could 'magically' eliminate standing waves and other cancellations, the decision would be an easy one for me. Basically, I'd like to be able to end up with an installtion that doesn't have an installed frequency response that looks like a mountain range.