so am still tweaking the system, but just added in the 3.3's and am tweaking their position. i have them nearly flush against the back wall, and like how they sound, but will try pulling them out into the room some, although the listening position would have to get pushed back and might need an overhaul of the room furniture arrangements.
the nht's definitely need more power to really sing and am looking at mccormack, aragon, acurus, and marantz monoblocks as my next upgrade as well as biwiring them. also will be adding room treatments to the walls next as well.
Just a suggestion, you already have a Sunfire pre, have you ever taken a look at the Sunfire Cinema Grand amplifiers, great clean power, almost no heat, and can be had at reasonable prices. I have a Sunfire Cinema Grand 5X200 and the power is endless, they also conform to OHMS law of doubling the power as impedance halves, the hallmark of all great amplifiers. I ran an Acurus 200 Five, or the 200X5 and the Sunfire is just clearly a nicer amplifier. Great looking set up, what is the center speaker sitting on?