speakers in serie and parallel question

one last question: If I choose just two 8 inch speakers per cabinet, I will get a sensitivity of around 95+ 3 + 3 = 101dB right?
then it might be best just to use two to keep things simple, and add a second speaker enclosure if more volume is needed.
 
Other design? The half space sensitivity goes down 6dB for full space.
yes, I mean in the previous post we have talked about a design with 3 speakers, and the baffle step correction is also present there. So should I also deminish the sensitivity of the total speaker in those figures? Or did you already take the baffle step into account for example in post nr 9?
 
I used the information stated in the datasheet from 18Sound. I suppose that is half-space, but its not stated in the specs:
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