I have had a 3320 for a year now with 100 trouble free hours. The 300 cx loader will pick up anything I can get in the bucket. I have the e-hydro which in my opinion, it the only way to go. You have an unlimited range of forward and reverse speeds, perfect for any loader work, mowing job or backing up to an implement. I know you mentioned a 3520, that is a few more hp than the 3320, but you pay nearly $1800 for about 4 hp. The 3520 has a turbo, the 3320 is naturally aspirated with a larger block. Both would be good but make sure you need the extra hp. They are a very nimble, comfortable tractor.