Depends on if your looking for SQ or SPL. Ive heard the infinity have very very good SQ and decent SPL and Ive heard the fosgates have very good SPL and decent SQ.
one ? is max is 1400 watts but rms is 300. normally it is about half of max and i know they are underatted. what would be the most logical rms power rating from these subs.
i would go with digital designes or Resonant Engineering those companies base all there potential on there subs.... Image dynamics have nice subs aswell but then u can rate the best sub for your pocket.....