bogeygolfer:
I own a TC40 with folding ROPS. I have R4 tires. I park the TC40 in my two car garage that has two standard 9'x7' garage doors. The key is to make sure that you get the door all the way up and there is very little lip left. Still with that, the hinges on the ROPS are somewhat close. It works okay for me, but I still hope to build a run-in shed or something later this year to store the tractor.
By the way, I also have my rear tires turned so I can have more stability on some of the hills around here. Even with them dished out, I can get into the garage with no problem, as long as I take my time.
Overall, I think you should have no problem. For only $120 more, I think you will like the upgrade. However, I have 4-wheel drive which is extremely useful at times, so you should probably consider that as well.