Switch from mach3 & china BoB to Linuxcnc & Mesa Card Combo

Now i am in the process of upgrading a 4x8 cnc router.I am now using mach3 and chinese bob, but now I want to upgrade using linuxcnc and mesa card combo with ethernet connection and maybe replace my current spindle with ATC spindle and add a rotary axis.

Here is what I use so far:
-4 panasonic servo motor, minas A4 750w (XYYZ) .Z motor w / brake
-3kw watercooled spindle 24000 rpm with huanyang VFD.
-24v NPN proximity sensor for home and limit switch.

I have several questions:
1. Is the 7I76E mesa card right for replacing the Chinese bob I am currently using? Or is there a more appropriate mesa card for me to use?(for the future I want to upgrade the spindle atc and add a rotary axis).
2. I am a little confused about encoder feedback feature on some mesa cards. Could you please explain? My servo motor uses an incremental encoder which is directly connected to the motor driver. Do I need to use a mesa card with this feature? Like Mesa 7I95?

the goal are:
-running with linuxcnc
-use ethernet mesa card
-add the rotary axis (X, Y, Y, Z, Rotary)
-Replace current spindle with ATC spindle

thanks for any input!

A 7I76E should work, and no, you don't need per axis encoders.

You will need pullup resistors on the 7I76E inputs to use NPN proximity switches

@PCW Thank You Good Sir..

So I guess if i dont wanna use pullup resistor for the Proxymity switch I should buy 7i76ED?

Or I buy 7I76E and change all the proxymity to PNP?