Buying Speakers Based on Specs

Terrible idea!

In terms of overall sound profile Spendor vs Paradigm could not sound more different at a base level.  The Paradigms are MUCH more forward.

This is not a bad thing but if you were to swap in Spendors for your Paradigms and assume they will just go a bit lower, man will you be disappointed.  

If you want deeper bass response, add a sub or two or consider a larger speaker from the same manufacturer unless you want to replace your electronics in this case.  Otherwise, if you want to switch manufacturers, you need to hunt another speaker down that is similarly forward. 

Ported speakers rely on room reinforcement to supplement the low bass,  also many full range speakers have complex (power robbing) xovers so a speaker rated to -6db at 26 hz may never be realized by the average consumer. I like subs for movies but prefer a full range 2 channel system for music. 

A really bad idea. Speaker specs are largely meaningless, with the possible exception of efficiency. 

I am willing to bet none of you guys have ever dated Ms. Kate Upton.

Buying speakers based on the CEA-2034 measurements (aka Spinorama) is probably the safest thing when it comes to buying speakers if you are going to just rely on 1 factor alone. According to NRC research it will tell you about 98% of the performance of speaker.