Add in the price of fluids (Hyd, engine, coolant), filters, and belts. The 4110 is due for a valve adjustment too. Tire tread? Worn bucket edge?
Hogging a wide open space or going into woodlots or between/ around trees? Larger is better in the former, can be limiting in the later.
Have you got something specific that needs to be lifted? A pallet of something at a specific weight, a few snowmobiles, or just loose bucket loads of aggregate/sand/horse manure?
My personal experience with the JD FEL lift spec is it seem optimistic in real life application. Don't forget to subtract the weight of the bucket/forks from actual lifting capability. And then realize that anything you lift (other than a thin slab of steel stood on edge) is going to be extended out from the pin point. 500mm is less than 20 inches.
Personally, I find myself wishing for more FEL lift capability occasionally (not always). Moving soils et al just results in more trips. But there are things that can't be lifted, such as equipment/pallets being delivered, large rocks, snowmobiles unless you have bigger capability.
Good luck