I would think you would be looking at a CR9070 or 9080, they always used to say, if you want output go with the Claas/CAT if you want a good sample go with the NH, it all comes down to local support from your dealer? if they were as good as each other, Me personally would go with the Claas/CAT
Well no TR-series is going to get there, so that puts you at a CR970. Not sure if any of them are getting enough hours on yet to get down to where the 480s are. 480s came out in '98 and the CR970 in 2003 - 5 years later.
Just remembering back a few years to 1999 when we run 2 tx 66 combines at 3 km in heavy barley 120 bu+ and a bit tough while the 480 was going 3.2 kms. It could go much faster but we could not get it to save. Next spring the 480 tracks showed up big time but behind the tx 66 was very little green. Loss was coming out straw chopper. I think there are big changes in the new 590's that help it a lot. After 2 demo's and visiting with neighbour who demoed it as well with similar results, we stayed with NH. Maybe a tx 68 would be similar size in it's day.