No Doubt that the MECs are the most numerous out there. If I were to buy a MEC, or most any other shotshell reloader, I would get the MEC "Sizemaster" along with the press. This device will bring your fired hulls back to factory diameters, then you can run the resized hulls through whichever press you decide on.
If you can tolerate some higher pricing, then I would decline all others, and go with the Ponsness Warren. The hull stays within a resizing die throughout all loading operations.
I have had a PW for over 25 years, and it still cranks 'em out like new, with beautiful 6 or 8 point crimps.
The least expensive PW is the 375C, and once in awhile you can find one on E-Bay, or Gunbroker Auctions at an acceptable price. Do not be concerned about buying "used" when it comes to the PW. They just last and last and last!
"Ridge"