Hi silverfox,
I am new to tractors... although not to machinery... and yes, it does sound like your tractor desires may be greater than your need for your property, but if you WANT... well that's a different thing altogether! /forums/images/graemlins/wink.gif
what I can tell you about has been my limited experience with the JD 3320:
Great Tractor. I think JD may be underrating the actual horsepower to make it more of a "match" for "the big Orange" machine's 3130... Yanmar is saying different (thanks RockyRidge)...
eHydro with LoadMatch... unbelievable... only a major impact, stump, etc. can stall this tractor... only happened once... automatically provides power when engine would get overdrawn. I shut it off--ONCE! No need to ever again... I don't know if Kubota has this feature... Your hands are free from throttle, transmission shift
Ease of use: everything is right there for me: PTO knob, right next to throttle, right by tach... loader joystick & rockshaft lever just in front of & to right of where arm naturally sits... tranny shift just outside L hand... 4WD engagement... a little low & initially chunky (now smooth) to the left & close to parking brake, but hey... this should not be getting the use of other controls!
What I'm getting at is it's a very ergonomically sound machine, AND:
Did the 50 hour (and switched out trans & front axle fluids way early--but petroleum products will be rising to meet fuel & it's like insurance...). Again the ergonomics were incredible.
When I rebuilt garage floor added 2x12 the lentgh of the "tractor landing", well it just so happens with that extra 1 3/4 inches a 5 gal bucket now slides right under front axle, transmission, and oil plugs--how sweet is that? Only front hub area plugs requires oil pan I'd planned to use for all. Plus whole job was done for under $60 (not on the synthetic bandwagon) & 1 hour of time....
MX-5 is a tank--have turned blades to shreds already (thanks former owner--where the he!! did an iron wagon axle come from, and why 1/2 buried?!?!?!), cleared nearly 2 acres of alder (clumps of 4-12, 1-3 inch diameter), not a complaint from it, only slipped clutch twice...
300Cx loader--if you can fit it in, you can take it where you want (I have HD 72" bucket). It's pried out stumps, delimbed trees, rolled granite 4X4X3 ft easily, dug part of a pond... & goes on & off in 3 minutes.
That's my limited opinion on what I've seen & know about JD 3320 eHydro. Ergonomics & ease of use/maintenance superb... better than any vehicle I've owned.
Drive them both, talk with dealers, get your feel for them.
I do all maintenance, so it's a BIG plus I really hadn't even thought much about... also might be good to check on parts network... with fuel going up, distances will be costing more & more to travel.
Good luck with the search!