Now if it were me shopping, I would get the 2060.. I would rather have the extra weight. I had a RB1060 (older version of the 2060)on my old 2210 and only time I had clearance issues was loading on a trailer.. I just shortened up the top link and that gave me greater lifting height.. I can and sometimes do use my RB1072 I have now on my 2305 and works for me.. Im only limited by traction when its on the 2305..
I converted a 54C mid-mount originally made for a 140 that I purchased from my local dealer to a 3pt rear blade years ago. To convert it from center mount to rear I made two plates that bolted to the swivel frame and then mounted the blade to those brackets just turned around 180 degrees. I used it on my 318 and 425 prior to getting the 2320. Here's a picture. I personally would suggest you spend the extra to have hydraulic swivel as I use that feature all the time.