I feel bad using my Shindo Haut Brion for watching movies, so looking for an alternative amp. Speakers are Devore O96's. Movie source is Oppo Blu ray, Monachy NM24 Dac and preamp. I was thinking of Naim Nap 250 or a 300B amp or Van Alstine Ultravalve. Don't want to spend much so second hand...