Rear blade choose and weight

[RMS]

I have the same tractor and I am undecided on rb1684 vs 1672. I was primarily going to just use for snow on driveway but will eventually find ways to grade with back blade. Is the 84 too big and causes issues bogging down when grading and or just seem too big on the tractor? I can pick one up used for 500 whereas the 1672 will be 800 with skid shoes

I haven't used mine for grading so I can''t give any advice there. But I would think if it bogged down you could take smaller bites.