NHT 3.3s -- too big for my room?

I'm not sure; the problem (advantage in some rooms) that I can see is that the NHTs were designed to go back against the wall, so if you put them against the short wall they may have problems with sidewall reflections and perhaps too much bass reinforcement because they'd be near the corners. Can they be put on the longer back wall?

They can't go against the longer wall. I do have the room heavily bass-trapped, however, especially in the corners. And the trapezoidal shape helps tremondously with side reflections (which also have traps at the mirror points). I'd actually be happy if these speakers could go up against the front wall -- the Contour 1.3SEs need to be pulled out from the wall, and as a result, they are a little closer to my listening position than I'd like.

Well then they might work, the trapezoidal shape is an advantage, and I forgot, but I believe the front baffles are canted inward so that the back of the speaker is flat on the wall but the front is toed in towards the listening position. That also will help on the side reflections, but you might have to adjust the width of the speaker placement or your listening position to account for that toe-in. Still wonder about the extra bass, though, as the 3.3s had tremendous bass extension, one of their strong suits. Any way the owner/dealer can let you try them in your room? Or maybe you can set them up near corners where you go to hjear them to see.

Anyway, I'm only speaking theoretically, hope some NHT owners can add their experience.