Originally Posted by gurkey
Its up to you. Do what you like and what fits your personal taste best or what you think sounds better.
To optimize further, i.e. phase and fc, you probably would need measurement equipment and a lot of time and effort, which might not be worthwhile.
On a second note the 80 Hz guideline has nothing to do with modern electronics, it's just the way a healthy human ear works, i.e. still can hear deep tones but can not localize their source below this frequency. Of course, the 80 Hz is not a brick wall, YMMV. More indepths on the subject can be found in the blog Small vs. Large in my sig. Hope this helps understand the phenomenon behind.