For 100% movies you could get a3-300 with upgraded driver, it would be approximately same size as Valor and would have more output and be cheaper, although probably falling a bit short of Valor in sound quality, but no slouch in that area either. But if you have as much money as the dsp 3400 costs, you should try fitting a bigger sub in, since you can rotate it in any way or lay flat on its side. Knight/Caliber/a7s-450 would be way better than either of your choices for HT.