Congratulations on your new rig! I've had my 4610 since April, accumulating about 30 hours, with not the first problem of any kind. All that power makes you feel unstoppable, but just remember to think ahead of the machine and don't take any chances. If you've not already done so, consider getting the rear tires filled with ballast. As you already proved, that loader can lift a lot... if there's not something extra in back to offset the load, you can find yourself in trouble real quick.
Also, if you are going to be doing any serious digging with the loader, consider getting a toothbar for it. Not much you can't handle with the teeth on it.
Needless to say, I think you made a great choice in equipment, and I hope you have many years of enjoyment from it.