My advice is be very very careful on hills especially if you don't have any tractor experience. The number of experienced people that have rolled tractors on hills is not funny.
4wd is very useful. Coming down hills the front wheels will be able to help provide traction. Also going up if it's slippery. If you use a front end loader it helps a lot with loading. I wouldn't be without it.
ROPS - what ever tractor you choose make sure it has roll over protection. Also I suggest getting a seat belt otherwise the ROPS won't really help you if you get flung out.
Duals are brilliant if you are wanting to go sideways on hills. Can be a little challenging going through gateways etc if they are narrow so something to be aware of.
Tractor Size for 45 aces maybe the 3910 is on the smaller size? It depends on what implements you want to run and how much time you have. Bigger tractor = bigger mower = faster mowing. At least where I live bigger tractors are often cheaper than the smaller tractors as they are less sort after..
Front end loader = I wouldn't be without my front end loader. It's amazing how much stuff you need to lift or pull out etc all the time.
Brand = The tidiest tractor in your area for your budget
I've got a ford but that's just because that was what was available at the time. I was also keen on a FIAT.
my 2c
4wd is very useful. Coming down hills the front wheels will be able to help provide traction. Also going up if it's slippery. If you use a front end loader it helps a lot with loading. I wouldn't be without it.
ROPS - what ever tractor you choose make sure it has roll over protection. Also I suggest getting a seat belt otherwise the ROPS won't really help you if you get flung out.
Duals are brilliant if you are wanting to go sideways on hills. Can be a little challenging going through gateways etc if they are narrow so something to be aware of.
Tractor Size for 45 aces maybe the 3910 is on the smaller size? It depends on what implements you want to run and how much time you have. Bigger tractor = bigger mower = faster mowing. At least where I live bigger tractors are often cheaper than the smaller tractors as they are less sort after..
Front end loader = I wouldn't be without my front end loader. It's amazing how much stuff you need to lift or pull out etc all the time.
Brand = The tidiest tractor in your area for your budget
my 2c