Went thru this same debate last year. With the help of folks on this forum, I narrowed it to the same 3 you mentioned. One thing that helped me was to think thru why I wanted a pellet smoker and how I intended to use it. For me, I wanted a smoker that will chug along automatically all night so I don't have to pull any more all-nighters. But I'm perfectly happy to use my Weber for grilling, so don't need pellet grilling features.
I eliminated the Memphis because they're very pricey and designed more for grilling. If you want to grill with pellets, it might be a good choice if you can swing the $. I really liked the Yoder, mainly because it is designed more like my offset stickburners. But I chose the Mak over it because 1- I read about a lot of paint issues with the Yoder, 2- the Yoder was pricier, 3- the Yoder's internal volume is larger, and I felt the smaller volume of the 1-star might make it smokier, and 4- the 1-star has the best controller in the business. It also makes more sense to me to have the burn pot in the middle and eliminate the exhaust stack, using grill-level louvres intead.
You can program the cook in stages. Since pellets smoke less at higher temp's, I often program the cook to start with 3-4 hours at low-temp "smoke" setting, then shift to a higher temp like 225 or 250 until the meat IT gets as high as I want (using the included probe, which plugs into the controller), then drop back to 200 until I get up and out there in the morning. Load it up with pellets and it will shift thru these programs automatically all night.
Really applies technology to the chef's advantage. I've had no issue with lack of smoke flavour and no need for any smoke tubes like many folks with pellet grills. And since I don't plan to grill, I saved $ by not ordering the flame zone. If you want to grill, though, I hear it works well.
I dealt with Mak directly and found them awesome to deal with. As options, I would suggest the 3/4 upper grill rack, the front shelf, and the cover (unless you can store it inside). I will say the cover is poorly designed -- apparently they make it to cover the extra side-shelf, which I don't have, so my cover looks big and floppy and actually blew off in the breeze.