I'm in the same boat as you.. I know everyone raves about them..
What I do know is they are a fair bit heavier then then the 1020. I'm not sure if the 2188 lift cylinders have enough to lift the header quickly. Also these combines normally have a 12 ply tire, a 16 ply is recommended for the heavier drapers especially a 36'.
But the feeding is way better than the auger header, it follows the ground better. Oh and it's way more money!