I have a
L3200 HST. The
L3200,
L3800,
L3301,
L3901 &
L2501 all have more or less the same frame & are the same tractor. The only difference is the engine & wether or not it has the tier 4 junk. The 01's probably have a slightly smoother 3pt.
I mow my 5 acres of pasture with my
L3200 in about half a day with either my LandPride 5' rotary cutter or a very old 7' For 917 flail. A few extra HP over my 32hp would be nice on occasion, but not to often. I'd be disappointed with less HP though. In retrospect I'd have paid an extra $1k for the extra 5 odd HP, but not the $2-3k they were asking for my
L3200 vs a
L3800. My rotary cutter will occasionally bog when cutting hood high grass, but not to often. It was slow going running a tiller across 2.5 acres when reclaiming the pasture (previous owners massively overgrazed it, nothing but packed dirt & weeds left), but it went pretty good with the HST.
You'd be a moron to get a 2wd or not load the tires unless you were just cutting golf course greens. You need the weight for the traction & being a small light tractor it really needs 4wd to put all the power down. Even with loaded tires, you need proper ballast on the back to lift stuff with the loader safely. I'd highly recommend you get a loader with a SSQA interface, makes swapping implements so much easier & implements are MUCH more common with SSQA.
As others have noted, with 10 acres, you might want to jump up to a 4 series tractor with a bit more weight, HP & able to pull a 72" or larger cutter. It depends on how long you are willing to take to mow the 10 acres. A Grand is a nicer fancier & heavier tractor, but generally doesn't have more power than the base 00 or 01 series. More bells & whistles & options for a cab. Down the road I might be upgrading to one for the cab & some of the other cool toys. The base models are very capable tractors though & a lot more bang for your buck. When properly ballasted a base model will do 95% of what a Grand will do other than lift capacity on the loader or 3pt.
Unless you are mostly going to be doing PTO related stuff, weight is the primary limiting factor, not HP. That doesn't help with your mowing & rototiller scenario, but it very relevant for dirt work. A
L2501 will outwork any B or BX all day long because of the extra weigh (and associated traction & lift capacity), not that I'd advocate for an under powered
L2501. All the L3x0x tractors clock in at about 3,500 lbs with a loader & loaded rear tires if memory serves.