depends on the amp you're gonna be using.. not too many amps will do .5 daily though. The difference in sound is nominal, air movement will depend on excursion, which will depend on power output which will depend on the amp.
.5ohm will pump more power to the subs, 2ohm will keep ur amp stable, and wont kill it by heat. but remember at 2ohms you will lose quite a bit of power to the subs compared at 1ohm, or .5ohm.
depends on the amp you're gonna be using.. not too many amps will do .5 daily though. The difference in sound is nominal, air movement will depend on excursion, which will depend on power output which will depend on the amp.
And from past experience, I would only recommend running any amp at .5 ohms for burps and VERY short periods of time. Not a daily driver. Ever. But that's just me.