Just for comparison purposes... I bought my 2520 when Deere was offering 0% financing AND a $2500 rebate if you bought two attachments with the tractor (loader counts as one). They were offering up-sell incentives into the 2x20 machines specifically because they weren't able to get the 1's off of the assembly line.
I got the machine, 200cx loader w/ CUT Carrier (JDQA) and front brush guard, 61" bucket, 62D MMM w/ mulch kit,
ballast box, 54" front-mount blower, and had the rears filled. I also had the power chute control option installed, the chute deflector option, and got the additional brackets to allow for the simplest changes between loader / mower and snowblower. Total for me, in including local sales tax and the Artillian forks w/ shipping, and I came in a couple thousand under the cost of your 3320 and loader. Considering the base price of the 2520 is about $4000 less than the 3320 and I got a $2500 rebate, that accounts for the bulk of the pricing difference.
The 2520 consists of: 26HP, MFWD (4x4), mid and rear PTO, foldable ROPS, hydrostatic transmission, and turf tires.