The NH 276 is a far better baler than the NH 273. I have owned both. The NH 273 is a good lower capacity baler. The NH 276 will eat that NH 273 in bales per hour.
I am currently using a NH 276. I also bought a backup NH 276. That baler has done less than 20,000 bales in its life. I gave $4500 for it one year ago.