7i95 or 6i25+7i85S+7i84

Hi, folks!
I'm ready with mechanical parts of chineese cast iron machine frame 3040 like this.


Firstly it will be driven by Lichuan LCDA357H 3-phase stepper drivers and appropriate closed-loop drives.
After some speed and stability testing i will choose use or not AC-drives.
Keeping in mind relatively bad unnamed C5 SFU screw accuracy i've choosed in advance to equip machine with optical linear encoders.
So, dual closed-loop.
Now, after deep googling, i need to choose between modern 7i95 or well-known 6i25+7i85S(maybe two)+7i84.

First are enough simple, well equipped, relatively fast and easy to use with any notebook or linuxcnc based ARM.
But, of couse, there are some cons - preempted core.

Last are more versatile, easy to future upgrade or adding rotating axis and runs under main Linux core.
But of course there are some cons too - PCIe port are needed.

Not the catastrophic decision, but please, let me know your opinion.