I don't know much about tractors except whats in my own little world, so I don't know about a recomendation, maybe just a description
I've got a JD 5203 with a 512 loader. 2 wheel drive. 50 hp works pretty well for me. I use it for baling, plowing, corn planting and picking, and all the other general stuff thats needed on a 100 acre place. It isn't a shift on the fly type thing, its a put it in gear and go. Goes about 20mph down the road and it has 3 gears and 3 rangesI haven't had any problem with it in the two years I've owned it.
Take it for what its worth, because I used a 1950 JD B before I got this one. I decided I needed a loader, and my shoulders just couldn't handle the steering as well as they used to...