If it was me, I'd be looking at atleast the JD5410 or JD5510 tractors, 65 & 75 HP. They are essentially the same machine, both 4cycl, but the 5510 has a turbocharged engine which gives it the extra HP.
Every implmenent you could ever need is of course available no matter which brand you decide on.
Since you already have a Ford, and presumable have been happy with it, you'll no doubt look at the NH offerings, wen has also pointed out the Kubota choices, but before you make any decisions, ride the Deere 5410 or Deere 5510. I think you will be impressed, and no doubt they will last at least another 25 years, (and will also no doubt have a pretty high resale value compare dto other models.) Deere, depending on the dealer, can be a little more expensive, but in my mind they are still the best in this size tractor.
PS: They also have a 5210 and a 5310 which are in the same line, but a little smaller and lighter. (45 and 55 HP), 3 cycl engines. Still nice machines but for what you want I'd think you be happier with the bigger machines.
Don't bother looking at the JD 4000 series; too small for your needs I would think.