Weight does help in another aspect. When I was doing 9-inch post holes with a bushhog auger, two 42-lbs front tractor weights made a BIG difference keeping the front end from doing a bounce every time the auger got past 18-inches in the hole depth. The negative with weight is trailering the tractor. My trailer has square tube steel construction making it doable to move the YM2610. However, if the trailer was angle steel construction, I would have to buy another trailer just to move the tractor across the county. My trailer max load is 3800-lbs, so the tractor and box blade just are under the limits.
The YM2500 and YM2610 use the 3T80 Yanmar engine. It's 31Hp. The YM2500 is the identical tractor as a John Deere 850 CUT. The YM2610 is the YM2500 with Power-Shift. When my JD850 died, Fredricks took it as a trade towrads the YM2610. I got a totally refurbished tractor with a 1-year warranty. Fredricks also has YM2610D with FELs too if you need. This would put the weight at a better lower number with all the combined accessories. Yes, a box blade is very helpful when using a FEL. You can drop the box blade down to the ground and the raise the FEL if the load is really heavy for the lifting part. Then raise the box blade a bit to move along. My neighbor has a JD650 with this setup. Not sure what Yanmar engine is in it.