Well I've put many hours on different kubota tractors. If I were gonna buy a Kubota tractor in that size I would only get the GHT model, called Glide Shift Hydro Transmission. I dont like there all hydro transmissions at all. And with the offering of the glide shift tranny, It doesnt make sense to buy the fully clutch version either.
There a darn good running tractor.
I will state this though, I own a ford 2120 HST 4x4, and just love it, If it were not for this model ford tractor I would own a Kubota with glide shift transmission, Ive put some serious hours on one and there a fast efficient tractor that can get the job done in a hurry, and I like the desiel engine.
Backhoes are an expencive item to purchase, and will ad much to the cost of the tractor, be sure you can use that piece of equipment, there not that easy to sell seperately, unless you come up with a give-away price. What I'm trying to say is, there are more people wanting a tractor without a backhoe the with a backhoe. A loader is the first Ideal attachment to have in general for that size tractor, another expencive item.
Another thing to concider, if it doesn't have the type of tires you want, look elsewere. Swapping tires and wheels is very expencive. Its best to buy a tractor that is exactly the way you want it.