Quoted from smalltownguy2:

The 9500 CANNNOT do any resolution above 720p. You don't need more ram, IT's programs ignore everything above 1gig anyway.
If you bought that game for $1000 - you STOLE it! It IS in fact a dedicated commercial pedestal. The CID inside that game alone is worth more than you paid for the whole thing. Well done!!
Thanks for posting your system info screen. The DG41 motherboard is a very capable motherboard, as is the 9500 video card. That particular setup is capable of running all 4 of Incredible Technoligies' games (Golf, Silver Strike, Power Putt, and Target Toss bags and lawn darts) with zero modifications. Sweet!
Here's the big secret with the Incredible Technologies Nighthawk systems: for the past 10 years, they've remained largely unchanged. The computers found inside those metal boxes have been running the same software since basically 2012. Yes, there have been newer motherboard and graphics cards used along the way, but that has been largely due to manufacturers discontinuing support of hardware as new hardware is released. Your system is fully capable of running the current version of Golden Tee 2022 right as it sits.
Now, to updates:
Being that your machine is running 2018 software, you will need to purchase a software upgrade from Incredible Technologies. The pricing to upgrade a machine starts at $400 for a machine that is one year out of date, and goes up by $50 each year your machine is out of date. For your machine, it would be $550 (before tax and shipping) to get that machine upgraded from 2018 to 2022.
The other thing we don't know for sure is whether or not your 2018 machine is running the commercial version (for money play) of the software, or the home edition version. I'm guessing it's probably running the commercial version, but perhaps set to freeplay. In order to "convert" the machine from commercial to home, you'll also need to purchase a new security chip for your I/O board. Incredible Technologies may actually provide this new security chip for free as part of the $550 you'll pay to upgrade from 2018 to 2022, but perhaps not. The replacement chip is $110 before tax and shipping.
Lastly, if you plan to play online to track your individual stats and participate in invites and events, you'll need to register the game for online play with ITnet. The online subscription to have your game green-lighted for online play is $99 per year, or $9.99 per month.
One note: if the previous operator who owned the machine hasn't processed a de-registration of the machine from their account, the machine might actually be listed in the servers at IT as still registered to the commercial operator. You'll need to double check with IT to determine if the machine has been deregistered or not.
If you're not interested in playing online, there are cheaper options to get your game upgraded to a newer year of Golden Tee. Many people online offer a security chip and hard drive package for converting your machine to run a different year of the game. Keep in mind though, if you didn't buy your upgrade from Incredible Technologies, you WON'T be able to put your game online, as they will have no record of your machine being updated to run the software you are running. You'll be forced to pay them the full upgrade cost just to get your machine online. For that reason, it's important to understand what direction you want to go in before choosing to upgrade.
Speaking of upgrades, if you wanted to upgrade the computer motherboard and/or graphics card, there are plenty of off-the-shelf options to do that. But since your motherboard will work with every game IT runs, it's probably not necessary. The only thing you're missing out on is 1080p versus 720p. And to be quite honest, aside from some slight graphics things in golf (blades of grass waving in the wind, ripples on water in the wind, etc) you probably wouldn't notice the difference anyway. I'm too busy enjoying the game to get wrapped up in the minutia of framerates and resolution. Besides, if you really cared about those kinds of things, you're probably a computer gamer anyway and you already understand how woefully old this tech actually is LOL.
Lastly, there are ways to get the other games (Silver Strike, Power Putt minigolf, Target Toss bags and lawn darts) to run on your system without adding much hardware. It's possible to have what's known as a "4-in-1" system running all of the games IT made. You might be surprised how little you would need to pay to achieve that.
I'm a wealth of info on this hardware. Feel free to ask questions, I'll try to assist.

Quoted from Anony:

I think it depends on two things. Your budget and how hardcore of a GT player you are. If you're more casual, don't care about online events etc the GO is probably a pretty good choice. If you want to be up to date, able to play invites and events for money the PGA or a HE is the way to go depending on your budget. If you know you'll still be playing in 3-5 years get the PGA and you'll be set for a long time.