mixer

I currently have an older 12 alpine type r 2nd gen. Does anybody think going to a soundqubed hds312 would be an upgrade as a daily driver sub or would it just be wasted money? There is also no mention of the hds312 box recommendation, and I am wondering if it would be ok in a 1.5 cube sealed OR 2 cube ported. I would be running it off of hifonics brz1200.1d at 2 ohms for 900 rms but highly doubt it since stock voltage isn't at 14.4v, so maybe closer to 700?