FWIW, I have a 3 pt disk. It's even one of the light angle iron jobs. Bought it on the cheap. Had to take it appart and use a press to straighten out some of the angle iron where the previous owner must have hit a stump or something. I love it. I do lenghthen my top link to get the disk completely level at 3-6 inches below ground. (However deep I am intending to till the soil) It's not perfect, it is a ganged disk that works for my food plots, easy to transport, and gets the job done. I like it over my PTO tiller because I don't want to risk my high dollar tiller in the unknown soil.
Drag disks, 3PT disks, tillers, plows, crop yields... its all in what your prepared to spend time and money wise.