I'm looking for a natural sounding 8 to fill the low end of a factory system. Space is an issue. The dealer recommends a Fosgate p1 8". Ideal box is ony 0.23cf. But the F3 is only 62hz. It might sound great, but no one has one hooked up. I can also get a JL or JBL (elsewhere). Both show a little better curve on their sites, going down to 52hz at F3. The JL and JBL take a similar 0.30cf. Any opinions on these mini subs?