How many acres will you work?
Buy a Category II Pat's Quick Hitch if you must. I would consider Kubota's telescoping Lower Links and Pin Adjustable stabilizers before a Pat's. Personal preference only. You know your needs better than me.
Do you have DRAFT CONTROL as part of your MX4800 Three Point Hitch? Draft Control can be a savior of Subsoilers and Plows in tough soil, or soil with occasional boulders and/or >3" tree roots.
If you buy a Category II Subsoiler from Monroe Tufline or Dirt Dog, you will be fine. You will pretzel any Cat I Subsoiler and likely the QH.
Start subsoiling with your Top Link short. Extended, Top Link stress increases rapidly. I snapped a Top Link bolt recently because as a newbie subsoiler I did not realize this. A new Kubota Cat I Top Link was $202.
You can pull a three bottom 12" or 14" Moldboard Plow with either 2-WD or 4-WD. To pull a three bottom 16" Moldboard Plow you will need 4-WD, even with loaded tires.
In tough Georgia clay, consider a Monroe Tufline DISC PLOW or an old Ford/Dearborn Disc Plow. Disc Plows are NOT Disc Harrows. (Lots of videos on U-Tube.)
Should you buy a 16" Moldboard Plow you will need a Disc Harrow with at least 20", preferably 22" diameter pans and a weight of at least 1,000 pounds to knock down 16" furrows. Tufline, again, a top brand.
TDP2 Series 2 & 3 Blade Disc Plows | Tufline