Over the years, I've had 2 14T's and 2 24T's. In the used market, if it makes bales, they are often about the same price. The 24T has more parts availability then the 14, and is a far better baler. On our last 24T, it had the #30 hydraulic pan thrower, and it baled a huge number of bales for us. If you find a used baler with the early mechanical thrower, run away from it as fast as you can. The mechanical thrower wore out the baler's driveline unmercifully fast.
One of our landloards had a MF #12, and my son would pull bales out of the chute and stack on the wagon behind that baler. The owner may have been a good auto mechanic, but he didn't know enough about balers, so my son was constantly trying to help him fix it. I don't know if it was a good baler model or not, but my JD 24T would do hundreds of bales compared to a single wagon load from that MF 12.
Parts availability is crucial. Baling is time critical, there is always a rain storm just over the horizon. And I think that means the choice should be between a New Holland and a JD baler (but not a 14T).
Paul in MN