I have a 4115 with the 410 loader. A 46 BH is in my future.
I can't say enough good about this little beast. It is a real workhorse. I just can't belive how well it digs. Once you get the hang of controlling to bucket as you push forward this thing will bury itself. I have used much larger tractors that didn't do so well.
It handles a 60" box blade well, a 55" roto-tiller witout missing a beat, and it definitly can pick up more in the bucket than the spec say. I had 10 yards of crushed limestone dumped in my turnaround area and within an hour I had it all spread out on a 400' driveway. I could pick up a heaping bucket of crushed limestone.
I chose the 4115 because it had 24 hp, direct injection, and a longer wheelbase. That longer wheel base helps for loader and 3 point work and also allows for a 72" MMM. It comes standard with MFWD, Mid-PTO, and a hydrostatic trans. I considered jumping up to the 4210 but noted that these items are options so the price would jump. I alos liked the idea of a plain old direct mechanical linked hydrostatic rather than an electric controlled hydrostatic. I don't know why but I just didn't see the point of the eHydro (of course I've never used one to compare).
Good Luck,
Ken