LW,
Welcome to the best forum on earth! You'll get everything you need around here, knowledge, chuckles, even smelly shoe bottoms from all the B.S. that get's slung out...haha. But, there are a lot of great guys around, some with a lot of experience in tractors, some posing like they do, etc.
Me personally, I don't know squat about tractors. Everything I'm picking up is either from this site, or reading literature. I do know a little about my particular tractor, but that's about it.
You asked about the JD 3320 or a Kubota
L3240 with FEL. I don't know about the JD, but they are great tractors. I, nor many people on TBN will be able to tell you much about the
L3240 either. It's a 2007 model and just hit the streets in the last month or two. I have a 2006 Kubota
L3130, which was it's predecessor. It's a great tractor, it's 4x4, and I'm sure that's what you are looking to get (especially with an FEL). I hear a lot of talk on this forum about it being an ALMOST, but not quite, necessity to have it you have a front bucket. If you haven't considered that, please ask around about it. I don't have an FEL, no need really, but the guys with one can tell you the advantages of having 4x4 with it...something to think about.
Like I said, the 3240 is new, so I don't know if you'll get too many "owners" of them to respond, although I know there are several people onboard TBN that have gone out already and bought one.
I wish you the best of luck. You can't go wrong with either color. Both there engines are made in Japland and they are both tight products. If I could afford and had a need, I'd have a green one in my garage too.
Later,
Podunk