Just for fun I thought I would jump into the fray. I know this is going backwards in series but I have never seen a baler take in hay like a Super I with good teeth. I have ran Gehl, JD, Hesston, Vermeer SI, Rebel, and R. My friend with the R will get mad because I can start a windrow at full speed and never slow down. He catches up on the wrapping vs. string but I can give him a run for his money with my $6k baler. Good times.
The Gehl was an 1860, good in its time but hard to get a bale started. The JD was a 466. I don't have time to talk about that headache trail. The Hesston 5540 I only kept one year and never seen it at it's best. The Vermeer's have been great all but the Rebel. As it has been stated, they are intended for a different, smaller tractor and horsepower so are lacking in areas. I bought the SI and after replacing the pickup drive clutch, all the teeth and cam followers I could not believe the difference.
I wish I knew people who really understand the net wrap systems for the I series and know the problems with them. It may be something I would consider if I could find out more about them. My equal fill/auto tie monitor says it is wrap ready.