Kevin we all have different budgets and different desires. I tried to give you a fairly wide range of things that you should consider. I have a Kubota B2910 and it is a fine machine, the one you are renting is very similar. I think it is a bit large for what you ultimately will want, but worth a try.
As for the Yanmars/Mitsu/Iseki/Hinomoto/etc grey market tractors they are probably all fine machines but you might not want one for your first tractor IF you are not mechincally inclined AND if you don't mind searching for parts. Some of them have goods parts supplies, others do not. And some brands have good parts supplies for some models but not for other models. However, the machines are capable and inexpensive. It becomes a personal choice. I restore antique tractors when I get the time and I have to source parts from all around the country, the difference is that I don't mind if the tractor is in parts and not working while I source the part becuase that is not my primary tractor. If you have a grey market tractor as your primary tractor and you can't find a critical part, you may face some down time. Then again, you may not mind and you may actually enjoy the search. So it becomes a personal choice.
As for the Chinese tractors, Jinma is sold under several brands including Jinma, FarmPro and Nortrac. All are the same except the decals. You can get them in a crate unbuilt or you can get them built. The guy who builds it has a lot to do with the fit and finish, and if there is a warrenty and anyone to stand behind it. They are bargains, probably don't have much resale value, but nobody really knows that yet. They are basic machines but they work.
Now for my personal editorial. I would only buy a tractor that had a warrenty, that had modern safety features such as ROPS & seat belt, and that had a hydrostatic (HST) transmission. Most will admit that a gear tractor can do everything a HST will do, and most will also admit that a HST transmission will do it faster, safer and easier with a much shorter learning curve. This is especially true for a tractor used for mowing the lawn and for using a Front End Loader.
Safety is a huge issue, and even those of us who play with tractors forget about it. It can be a fatal mistake. These are big fun useful tools, but just like a gun, they can be used for good or they can kill you. Keep safety at the top of your mind.
When you talk to dealers, ask them about safety features. Also ask for tips and tricks and generally make sure you feel like they care about you as a customer. Buy from the dealer who makes you most comfortable, who will support you when you need it, and who lastly also gives you a fair price. Brand should be the last consideration.