Whoops, looks like I misread

I had a 3120 before my 110, and it had the 60" bucket. His 3320 with cab will be more equivalent to my OS 3120. No way would I be getting full loads of gravel with that size bucket. My 110's bucket is a 72"! There are plenty of times when it's working hard with that size bucket and it's a much larger more powerful machine. Unless all your doing is light material (snow/sand MAX) I'd get the smaller bucket. Don't take this the wrong way, just trying to help. But take a look at the buckets and size difference between the two. Picture doesn't really do it justice, but I'd be weary of the larger bucket.
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I agree on giving the bucket sizes a lot of thought and understanding what works well where...
So, there's a couple of things that I think are worth mentioning...
1) I think most first-time buyers (myself included) go with the premise that they want the largest bucket available, especially when they see that the price difference from one to the next is comparatively small.
2) Having the larger bucket tends to not be an issue because they aren't regularly using it to move *heavy* material (like gravel).
3) After using the loader for a while, you realize that you can't "fill" the bucket, so having a larger bucket that you partially fill will move more material in one pass. Plus, by not trying to fill the bucket, you end up with a manageable amount of material that you can move without spilling.
4) If you find yourself doing a LOT of loader work, get a second bucket and go smaller in size. Having the choice will end up being very helpful.
5) Having the larger bucket (read: wider) means we can drop the loader and drive... And clear a path that the tractor will fit through. And, for a lot of us, that's a need.