Since you said "basic", I'll try to weigh in on my experience. I have the Maverick ET-732, a green Thermapen and for injectors I have several that came free with jars of Cajun Injector Creole butter.
The Maverick has been great, aside from the death of one probe. The wireless function is nice, but I think I could live without it. If I had it to do all over again, I might just go with a couple $15 non remote probe thermos and use one for the meat and one for the pit. They're cheap, locally available and as far as I can tell, are just as reliable as the maverick, the probes being the weak link.
The Thermapen is just plain awesome. It's balls on accurate, fast and about as complicated as a hammer. It's also a very pricey little gadget. I've become dependent on it for every day cooking, and would be ENORMOUSLY unhappy if someone were to take it away from me. All that being said, if I were to do it again, I think I'd probably try the $30 Thermopop by the same company. From what I've read it's almost as fast, just as accurate and nearly as simple. It's also 1/3 the price. In addition it has the rotating display, and since I'm left handed, I really like that function. With the Thermapen I've gotten pretty used to reading numbers upside down.
The injectors I view largely as a throwaway item. I don't compete and I probably inject once or twice a month at the most. Since I really like Creole Butter for chicken and pork loin, I usually have 4 or 5 of the things in the kitchen drawer. I reuse them until the needle gets dull or breaks or they just look like they need to be retired. To clean I just soak in soapy water then run some soapy water through the needle several times with the plunger. I usually follow that with a spray of Clorox Clean-Up and a rinse in hot water.
So basically, the setup i have retails for about $165 +/-. The setup I'd probably get if I were starting from scratch would run me $65 +/-
That leftover $100 would buy a good bit of meat.