I always debated doing away with my two 1501D's for a 1 ohm stable amp that can put out 3000 watt RMS at 1 ohm. Figured I would save space, and having one amplifier with one channel and 1 of everything else would use less amperage. Guess not. Quick question, by 2ohm stereo vs 1 ohm, are you talking about two amps like my situation, a class D with two channels, or are you using a two channel class A/B ? If so, is it better for SQ, higher dampening factor, better frequency response (not that it matters)? Cant say I really know anything about your amps other than reputation.