oh ya preamp Anthem D2v
One of the aspects I enjoy most about my SoundScape 10 is the abundant, clean and accurate bass. As several owners have noted, the SoundScapes also are remarkably tolerant of placement that is not ideal. IMHO, it would be a shame not to take full advantage of the low frequency capabilities of the SoundScape.
What frequency do you intend to use to crossover from the SoundScape 10 to the sub or will you run the SoundScape 10 full range? Achieving a more accurate and seamless bass match with a subwoofer than the SoundScapes operating full range will provide down to at least 25 hz may prove a fool's quest.
As you consider what speakers to use in the center and surround positions, the intended crossover frequency to the sub for these channels merits consideration. The sub might handle mostly the LFE in the ".1" channel.