We have a 5410 and to me it is the second best piece of equipment we own (compared to the disc mower coming from a sicle mower lineage). I had a couple of different brands and was not happy. So I did some research (plus went to watch some people bale with them) and found the best baler on the market-my opinion. To me the difference is the 5410 is a little better than the 5400. Agreed it has a better belt setup, a better option to tie or the availability to netwrap, and the bale ramps are nice. To me the best option is the ability to run on a smaller tractor. We run a Ford 3210 (38hp) and it runs with no problem, a little slower on a hill, but does not stress the tractor like the other brands. Gathers up or swallows up hay like no other. Still able to see the bale building above the string box (not as easy as some).
The only problems we have had that are normal with round balers.
1. Bearing on top roller. (found at dealer but also found local bearing place with lower price).
2. Broken Belts ( Bought replacement from EXCEL- best price for quality belt- fun to lean to run & lace).
MY dad (who is hard to change from older methods) loves this baler. Made our haying life not a dread but an enjoyment.