The only thing I might hesitate about is the 3.3's bass output. I've heard those speakers extensively in my friends system (much larger room) and they put out some of the lowest, most detailed bass I've heard. His system was the upper tier of Levinson gear. They're really impressive in that respect. They're nice speakers though...require some serious power to make'em sing. He had his right up against the back wall and they threw a very wide sound stage. Beautiful piano black finish too. Heavy as all get-out. I didn't know they were still made. I've seen them being sold used once in a while for around $1.5 - 2K. I'd speculate those bass traps are going to be very necessary in a room the size of yours.
Marco
Marco