I would like to see a domain with games or casino in it when I am looking for a gambling site,its just my opinion but OP doesn't have anything related to my preference.
I just added another domain name that contains Casino. You can now vote your choice.
You mean the Casinoox.com?
Nothing substitute for casino domains that has exact match keywords on it but this one doesn't fit either. I would have to agree with the polls which received more votes, the DiceWheel.com. Unless you do have more than Dice and the roulette game on it, its perfect for both games on it. Domains are hard to find or may be you can use a not so familiar extension which marketing could be much harder to do.
Didnt find for Casinoox.com to be fit out among on the seleciton.Dicewheel.com will be the best if he do plan to make a dice site which is really connected on what he do offer.
Vegasprize is also a good option too if he plans to make a casino because this will fit out casino games since we know on what is Vegas when it comes to gambling world so
its also a good choice.
Domain names does have some impact to public because if they do see it somewhat catchy and attractable then you might succeed but ofcourse you would need to pass up first on having a good marketing for the final touch.