I borrowed one of those for a week because my GF buggered off with my D810 for an important shoot.My last purchase was the Canon 1dx and I am getting ready to purchase a Canon 5drs
Unless you depend a LOT of wide angles and extremely controlled DoF, stick with a crop sensor.I keep telling myself I don't want or need a full frame camera, and that's half true.
I bought a d7200 last year, it's great. I keep looking at d610 reviews so the temptation is strong.
Please to look at these instructions. https://jongrepstaddotcom.files.wordpress.com/2015/09/lfcam6a1.pdf As soon as we get back from San Diego I am going to start on this in quarter sawn white oak. It will be my summer project. I plan to have it completed by the time we drive to San Antonio for a week in mid September. Not the most convenient of cameras, but with the wife in a conference for three days I will have time to go have some fun in the old parts of town etc. The last 4 days she and I will putter around that part of Texas before heading home so that will be digital time.Not buying a digital camera, but building my first FILM camera 6x7cm, something I've been wanting to do for years and it gives me a nice way to pick up "film" again after so many years.
Collecting a near mint Mamiya (Press) 50 mm superwide lens + viewfinder tomorrow, still looking - not ebay - for a decent Mamiya 67 filmback.
Guess this project will keep me busy for the rest of the year.