Whew! You've got some GOOD info, and you've got some not-so-good info. Let me throw in my $.02 worth, and you be the judge of where it falls in the grand scheme of things.
I farmed about 200 acres until 2 years ago. Now I have 45 acres. With the exception of a few years when I went POWER CRAZY, I never needed a tractor any bigger than 67hp. The last 10 years, no bigger than 60. And add to that, probably 75% of the chores I did were with one of a pair of tractors, 40 and 47 hp. ALL except the POWER CRAZY phase were 2wd. (It was a 110hp, MFWD Deere)
Now don't get me wrong, 4wd is nice to have if it fits in the budget. In the last year, I've started a mowing business. I bought a MFWD 95hp tractor to pull a 15' batwing AND for my son to use on his small farm. MFWD is handy but NOT indespensable. Big power is nice to have, but you'll need EXPENSIVE implements to compliment that power.
I currently own 2 Deere's, a Ford (New Holland), and a Massey Ferguson. As far as the state of affairs regarding pricing of parts, Deere has a great parts network. They're NOT cheap. New Holland is ALMOST as good about getting parts, and, from my experiences, a tick more expensive in general. Hard to compare, as I've never had to order "Deere apples" and "New Holland apples" at the same time. In the end, they're both pricey, but both deliver as promised. AGCO (Massey Ferguson) is just as reliable on parts availability, and from all I've seen personally, a fair amount LESS expensive on parts.
Service is SOMEWHAT brand oriented, but more often than not, it's the DEALER who makes or breaks good service.
A couple good friends have Kubotas. I've borrowed one on occasion. (For its backhoe) You won't go WRONG with one. Initial purchase price seems competitive (or better) than some other brands. I HEAR parts are spendy, but don't know that as gospel. Never bought any.
Keep ANY tractor long enough, or use it hard enough, and parts become an issue. Don't let anyone try to fool you. They ALL break from time to time.
Don't get me started on grey market tractors. A war would ensue. Don't like 'em. Wouldn't own one if someone gave me one.
Don't fall into the trap of condemning ANY brand or model for being "import". Across the board, ALL brands bring 'em across the ocean. Quality needs to be judged tractor model to model. Point of origin doesn't dictate quality.
My PERSONAL recomendation? I'd go with something in the 50 to 60 hp range, mid-sized chassis, MFWD if that's affordable, and from one of the "majors". I detest the term "BIG 3". (Deere, Kubota, NH) That leaves out the one manufacturer who sells the largest number of tractors to a worldwide market...Massey Ferguson. They have a lot to offer, and do so at VERY competitive pricing. It appears that there's more rumors than facts floating around the 'net about them. Don't sell 'em short.
And there's a few less famous, but still fairly decent imports available. I'm not a big fan of any, but you'll hear all about them before this thread dies I'm sure.
Avoid like the plague any advice that starts off with "I bought the best tractor made" sort of claims. This person has not the first clue what YOU need in a tractor. His may well be perfect....for him.... and it MAY be a consideration for you, but no one can judge what's best for you other than yourself.
Buying a new tractor is a lot like finding a wife. (Oh my....I actually said that!) The fewer pre-conceived notions you take in to the search, the better you can judge the candidates. Keep an open mind, listen to what everyone has to say, but keep in mind, YOU are the one that has to live with it. Get what suits YOU.