Between an IDMax, a Brahma, and a X.X.X., which is better for both SQ and SPL, geared more towards SQ? Also, which would sound the best at 900 to 1000 watts? And whichever is better, would they sound better in a sealed or ported box? Any other suggestions on subs maybe something from Eclipse or someone else?
Nope. Aperiodic is strictly SQ, it's less efficient than sealed. If you want good SQL, then try one of the subs mentioned above in a lower tuned ported enclosure, such as ~2.5 cu ft net tuned to 28-32 hz.