I think the Kubota finance option has changed since I got mine a year and a half ago, in Canada it was 25% down, then 0% for 36 months. Still a good deal in my opinion.
TripleR had some good advice, look at what implements you need and build the tractor around them. Being able to move round bales means a bigger tractor than you need for the rest of your chores unless you want to use a 3ph bale spear.
Try to size the tractor based on your long term needs as much as possible, what you need today may be overkill 5 years down the road. If you need something big up front, either look closely at the resale value and be prepared to trade/sell down the road, or borrow/rent/hire the heavy work out for now.
Sean