Hi, freedy,
I have a 4610, the next size down, with an ehydro transmission and about 415 hours on it. Have the 460 loader. The tractor is absolutely bullet proof, and I use it hard. Only regret is I didn't get the 4710 with a little more power. The ehydro really sucks the power away from the PTO. I was considering trading up to a 20-series, but the Yanmar engines in the older 10-series are known quantities, and I've heard there are some teething problems with the new JD turbo engines in the 20s.
Good luck with your purchase.