I have a New Holland TN75, a Kubota 4630, and am currently demoing/probably going to buy a John Deere 5325 to replace my Kubota. I know that the 5325, with only 67 hp, is a little less powerful than you are looking for, but for your needs it might be just fine. I have put about 10 hours on the machine running it with a 10 foot woods mower in very tall grass and the thing just has tons of power. I have run it all day mowing a 55 acre field on my farm, in high range, first gear, low speed (24 by 24 trani) in the Economy PTO setting, so under 1500 RPM the entire time, and it does not struggle one bit. I'd say that if the New Holland TN75 has 75 hp than the Deere feels more like 85 because it is absolutely a more powerful machine. Successful farms do well by minimizing the amount of money spent on equipment and by buying the right equipment. The deere would certainly be my bet with these thoughts in mind. A guy 45 minutes away from my farm has a 5320 with over 13,000 hours on it. I'm sure that other manufacturers can claim this as well, but I'd say that the slight premium you pay for a 5x25 series tractor might very well be worth it in the long run.