Add me to the list of folks suggesting a Kubota
L3710 HST. I use it with a loader and run the midmount mower. Without the midmount mower, I run a trencher, a sickle bar mower, a logging winch, and a shredder. I also use it to bale hay pulling a NH 311 baler.
I was looking specifically for a hydrostatic tractor with no more than 30 pto hp to run the trencher. The trenchers I've seen restrict input to 30hp and require a hydrostatic trans to get the super slow ground speed you need. With the hydrostatic trans you can run the engine fast enough to maintain pto rpms and still crawl at a snail's pace.
I've got a quick disconnect on the loader so I can switch over to forks. I've picked stuff that Kubota wouldn't be happy with weight wise. I can't say enough about the machine. It's been superb. Last summer I used it to winch a 2 1/2 ton IH dump truck up a hill to remove earth for a cistern.
I've got a Ford 5600 (60hp) MFWD and I still prefer using the Kubota unless I'm towing really heavy loads. After looking at the other brands and reading the posts here, I knew the Kubota was going to be a problem free tractor.
I'm too far from a dealer to buy a tractor that's going to be a hassle.
Acreage wise, I cut hay on about thirty acres and mow about five acres. The only beef I can think of is that the midmount mower is not exactly easy to hookup or remove. That's working on grass. If you have a paved area it'd be simpler.