Great choice! We own an 8410, and have nothing but good things to say about it, plenty of power and the transmission is real smooth and the hydraulics are best in its class. It is also very easy to operate with all the controls right at your fingertips. Another great thing is that if you want to upgrade in a few years, they have great resale. What jobs do you plan on doing with your 8420IJ If its gonna be a tillage tractor I would make sure it has big tires, at least 20.8, get more power to the ground with less compaction. Also, ballasting and low tire pressure really helped bring the power out of our 8410. Just my 2 cents