Glad to hear that he is eating and drinking fine! Bengals do love to play in their water bowl -- I have the same problem with mine. I use a Neater Feeder which will contain much of the splashing.
Know that neutering your male will not stop the marking. My bengal is 9 years old, was neutered at 12 weeks and sprays. Used to be he sprayed only on our walks outside or on the walls of his enclosure. Now he has three places in the house that he has been spraying and I've ordered some stuff to take care of that and put out the Feliway again. Marking is for territory! And male cats, especially, have to have their territory! While you may notice less marking ... I'm afraid once they start, it just continues forever! Not much you can do about it, although I am considering creating a diaper for mine to wear when he is in the house! I'm sure that will go over great with a bengal.