Factory Speaker Replacement - Advice Please

[jlm74]

I've got a 2018 Nissan Rogue with the upgraded 7" headunit and 6 speaker non-bose system.  I'd like to upgrade the (4) 6.5" speakers that are in the doors, while leaving the 2 tweeters in the corner dash alone. 
 
Nissan has complicated matters because the whole system is a 2ohm system.  I know that if I use a speaker other than one designed for 2ohm, I'm going to have a loss in volume.  To complicate matters, a friend of mine keeps telling me if a speaker is more efficient that it will make up for the loss in volume, so I'm totally at a loss here and need some advice. 
 
I'm not interested in installing an amp or subwoofer, just replacing the factory paper speakers with something that will sound a little better.   
 
There seems to be one OEM fit drop in replacement: 
https://www.crutchfield.com/p_151L2652/PowerBass-L2-652.html
This unit is a 2-ohm speaker that seems to be designed to work with the factory unit as-is.  It just seems a little.. underwhelming considering the specs.  
 
The other alternative that my friend keeps pointing out is a 3-ohm speaker:
https://www.crutchfield.com/p_108R6532EX/Infinity-Reference-REF-6532ex.html
He keeps telling me that while it's a 3-ohm speaker, the loss in volume would not be that dramatic, and the speaker is more efficient so there wouldn't be a big difference in volume.  He says this would be a better choice because they would deliver better clarity and detail.  
 
I'm not a huge audio guy, so I don't understand the numbers, so I thought I'd seek out some opinions.  Based on these two speakers, does anyone have a recommendation?

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[audiobaun 5,000+ posts]

Take a look at some JBL speakers that are rated 2 ohm

 

[jlm74]

I've tried to find some JBL speakers that would fit and are rated at 2ohm and the closest I can find is the JBL Club 6520 - also rated at 3ohms

 

[audiobaun 5,000+ posts]

I've tried to find some JBL speakers that would fit and are rated at 2ohm and the closest I can find is the JBL Club 6520 - also rated at 3ohms

You are not going to tell that much difference from 3 ohm to 2 ohm with a 1 ohm difference on any stock speaker without an amplified system.Maybe just a little more clarity, if you have bionic hearing but depends on your volume level.Should be just fine

 

[audiobaun 5,000+ posts]

Even 2.5 ohm should be just fine.

 

[jlm74]

Ok so then you would also recommend using the 3ohm Infinity speaker over the 2ohm powerbass speaker? 

 

[audiobaun 5,000+ posts]

Ok so then you would also recommend using the 3ohm Infinity speaker over the 2ohm powerbass speaker? 

Id recommend a JBL over Both to be honest. Infinity does sound good though. Not a whole lot different than JBL to be honest within this catagory of speakers

 

[trumpet 5,000+ posts]

CDT Audio has 2 ohm 6.5" woofers that could do the job well. PM me your e-mail address and I'll send you the details of my recommended package to handle this tonight.