It does seem over whelming looking at all the different options. Here's my experience with the 4044M (base mode) but the same hp and drivetrain as the 4044R, it needs more power for a machine that size. My old 40hp gas gear drive tractor seemed like it had tons of power but this wants to bog down going up my driveway in M-range at WOT. Sure its a decent hill but having to let up on the e-hydro to regain rmp is a stinker, when taking out the trash.
My dad's Kubota L5300 wouldn't even consider slowing down on the same hill. My point is look at the 4052 because it's surprising how much power it takes to move the machine unloaded and I prefer to work and use M-range without have to shift to Low or let of on simple tasks.
I much preferred the two pedal setup Deere offers and that in combination with the creature comforts of the Deere swayed me over the Kubota. BUT I'm certainly regretting the power difference, 44hp is simply the absolute minimum a machine this size should have and mine doesn't have AC chewing even more power.
Good Luck they all make nice stuff!