It's taken everything I've thrown at it and then some. That said, it's my first modern tractor (last one we had was an ancient Allis Chalmers, then I did some city living for a while). Compared to that, well, there's no comparison
The LS has been great. Only problem I've had was snapping a door hinge because I was stupid - too close to a tree, didn't close the door before I started backing up. $50 mistake right there. Aside from that, it's moved trees that I didn't think it would budge, dug through tough Missouri clay, and just generally has been put through my kind of inexperience rather well.
I've only got about 55 hours on it right now. Went through my first regen at ~35 hours, and it just keeps chugging along. The backhoe is more capable than I need, the loader fills easily, and it does more than I need.
We were looking at a 3037, but the dealer said that once you get the machine all optioned up with a cab and such, it's only a couple thousand more to get into a 41xx. He had the 4145 on the lot, and I only dropped another 2k or 2500 (don't recall exactly) on the 4145. I figure you can never have too much tractor.