Need help with MESA hardware

Hi,

im planning my new mill. I use JMC Drives + Motor. The motor`s encoder has 2500 lines per rev. The ballscrews have 10mm pitch.The gear ratio is 1:1, so i got 1 micron accuracy. 

I can use the drive in torque (analog) , velocity (analog) or position mode (step / dir).
I want linuxcnc to close the loop (linuxcnc should know where the axis/joint is)
Now i figured aut 2 configurations for my machine but im not sure about loosing accuracy.
My favorite is to use a Mesa 7i95 so i can easy use a stepper for my toolchanger.
But i think ithat the drive acts like a stepper with 2500 lines per rev - so its maybe not possible to position the axis with the same accuracy like a system with a 7i97 ? 

maybe somebody can help me


 

i think when i use the 7i79/7i95 i can use 4x mode to read the encoder (i got 10000) - so i have a scale of 1000.
but the encoder just can 2500 - so i got a scale of 250 (in position mode)
the drive allows torqe and velocity only with analog setpoint

this is why im think that i need the Mesa with analog setpoint