BUt a small tractor just cant lift the same amount has a big tractor
And there-in lies the trade-off. Your first post didn't really put any priority on all the tasks you wanted to accomplish. Are you going to spend the most time using this tractor to lift heavy stuff or working in tight places? Also how much tractor can your budget stand?
The "round bail" capacity is the biggest question. One opinion was get a SSQA FEL.. drop the bucket attach a bail spear and your 'll be fine (round bail is closer in and the bale spear weighs less then a bucket. The other opinion was ANY CUT just doesn't have the stance and mass to handle stacking or unloading round bails.
There are so many variables in determining the weight of a Round Bale, like Width, Diameter, Type of Vegetation, Moisture Content, and Bale Density (different balers will pack looser or tighter than others) that it's almost impossible to estimate an "average weight"
There's actually a pretty good "discussion" I found on it over here
http://forums.yesterdaystractors.com/viewtopic.php?t=655713 if you're really interested.
Another good point they make regarding bale size vs weight is that a 4' W X 5' Dia bale and a 5' W X 4' Dia bale are NOT the same volume and thus (all other things being equal) will not weigh the same.
Also remember while you're shopping that some manufacturers spec sheets list loader capacity as measured at the pivot pin, some list at 24 Inches (500mm) out and some list both (so read the fine print).
The point being, the farther your load is from the pin, the less you can lift. On
average - capacity drops by about 30% at 24 inches from the pivot pin - His numbers not mine
compact tractor review [dot] com / articles / Loader-Specification.aspx (Side note - Are we really so insecure as a forum that we have to automatically block out links to "competing" sites? )
A FEL mounted spear will the load out a considerable distance away from the pin, maybe even further than 24" (for quick calculations you can assume half the length of the spear you're using).
So for the tractors K0ua listed (and I'm not knocking any of them at all)
MF 1734E - Using L105E Loader - 1,210 @ Pin and 847 @ 24" (Calculated)
Kubota
L3301 - Using LA525 Loader - 1,131 @ Pin and 855 @ 24" (Their Numbers)
JD 3032E - Using D160 Loader - 1,186 @ Pins and 845 @ 24" (Their Numbers)
I would suck to get a load of round bails delivered... only to find out they were a bit wet and I wouldn't be able to off load.
If you're able to request the size when they roll it and you go with 4' Wide by 4' or 5' Diameter then you might be ok with this size / class tractor. Anything bigger is asking for trouble.
If you are only looking to offload (and not to re-stack for storage on your end) then I would suggest rolling / pushing them off and using a 3pt spear on the back to transport them. For this class tractor you're going to get nearly double the lifting capacity this way.
If being able to stack for storage at your place is a requirement, you flat out need to go bigger.
And for the record we have tried lifting a 4' W by 6' Dia bale w/ the FEL & Pallet forks (CK35 w/ loaded rear tires and ~750 lb counterweight on the 3pt) and the loader just goes into relief without the bale so much as flinching.