I have a LP606NT pull behind which I have owned and used for 6 years now. If I recall the specs correctly, you only need 40 HP to pull the pull behind but they recommended 60 HP for the 3 Pt. I have a 68 HP tractor so I wasn't concerned about the HP but I did not want to have the added weight of the drill on my tractor as we have somewhat hilly terrain and I thought it may become tippy. I have been backing up trailers for decades so ease of backing up the pull behind vs the 3 Pt is not an issue for me but it may be for others.
I have clay-loam soils and I haven't turned the dirt since I purchased the NT drill in 2016. I plant into heavy thatch and have never had any issues planting. I did buy the weight brackets which you can hang suitcase weights on if you need additional weight, but I never needed any additional weight.
I saw a prototype Genesis drill up close and personal when I toured Dr Grant Woods "Proving Grounds" in 2015. It was a nice drill but really can not compare with the Land Pride or Great Plains drills (which, BTW are the same drills but just painted different colors). Yes, the LP or GP drills are more expensive but as we all know - you usually get what you pay for. Not saying that the Genesis won't do the job for you - just that the LP/GP are a much higher quality product and probably hold their value better as well.
As far as calibration is concerned...yes, there is a little learning curve to it but once you have done it a couple times, it is very easy IMO. I have planted corn, soybeans, sugar beets, brassicas, clovers, cereal grains, switchgrass, 12 variety cover crops using both the large box and the small box and probably other crops that I can't recall. Some of the seed sizes have varied from year to year so many of these I have calibrated more than once, or maybe wanted to changed the planting rate per acre the next year, so I have calibrated my drill many, many times. It is a piece of cake once you learn how to do it.
I have successfully planted into a wide variety of cover crops...such as terminated rye...
rolled cover crops...
standing beans which the deer had hit pretty hard...
a fairly short cover crop...
heavy sod...
a standing cover crop...
another standing cover crop...
I have drilled tiny switchgrass seed with it very successfully. I don't need the NWSG box as I don't plan on planting fluffy seeds like that...
I calibrated my drill to accurately plant only 2#/acre of RR sugar beet seed. Yes - this entire 1 acre plot was drilled with only 2# of seed.
I am not interested in having a drill that only has 1 box. There is a reason the better drills have a large box for large seed and a small box for small seed. It works - very well.
My drill is well cared for and still looks almost new. I am quite confident that if I died tomorrow my estate could sell it for very near what I paid for it over 6 years ago.