Which Mesa card should I buy?

Hi everyone, 
I am very new in the universe of Linux CNC and programming a CNC. So I have a few question about this.

Recently, I learn that I need a Mesa Card to make a CNC. I was wondering why I need that part and which one should I pick ? Because in the pncconf, there are quite a few card that I can use. 

Thank you !

You do not need a Mesa card, you can happily run even an industrial machine with a parallel port, i know i did
Find a used PC with a parallel port and wire stuff up, make it work, then see if you need or want to upgrade.
Parallel port has it's limitations, but it is perfect for plenty of stuff, there are still parallel port cards on sale, new, but some are "software emulation" so will not work for machine control, some do work, just plug in and boot.
Mesa cards are a different beast, although some can do parallel port stuff/pinout, but at a much, much faster rate. Oh and each Mesa has at least 2 of those very fast parallel ports, and is not limited on what pins can do as the parallel port is, Mesa can do anything on any port at ridiculously high speeds.
The Mesa combo boards are a treat also for wiring, makes everything simple and not "spaghetti monster"
And can be upgraded and extended and combined.... and...

You do not need a Mesa card to run LinuxCNC, its is one of many options.
The simplest is perhaps a parallel port.

What hardware is appropriate depends on what machine you wish to
control, what performance you expect, and how much time you are
willing to devote to setting up the controller.

What kind of machine and motor drives do you have?

Thanks for the answer!
At this moment, I think I will choose the option of a parallel port.

Do you know where I can find this part? I am using a Raspberry Pi 4 model b with a digital stepper driver DM556T. It's a 3 axis machine with 4 motor and 4 drive. 2 of them are use for one axis.

Thanks for the answer !

Its woodworking CNC machine. I am using a Raspberry Pi 4 model b with a digital stepper driver DM556T. It's a 3 axis machine with 4 motor and 4 drive. 2 of them are use for one axis. Those motors are stepper motor 4.2A 3N.m

I don't expect any big performance. It's my first one, so it will be great that is a reliable one.

If your financial possibilities allow you to buy Mesa. Buy a Mesa 7i96s. I lost a year of my life trying to find a suitable computer with a parallel port. I ended up buying a Mesa and the machine started working reliably. I don't use Mesa for their performance, but for their reliability. When there is a problem with Mesa, the machine stops and gives you a message about what is happening. When there is a problem with the parallel port, the machine produces a scrap and does not tell you anything.