Stick with the Casio. I used to be a Luminox fan until it broke. The watch was expensive enough as it is, but then it cost nearly $100 to get it fixed. Come to find out after doing a bunch of research, I was not alone. Seems Luminox are not only proud of their watches (just ask them and look at the price), but there is like maybe 2 places in the USA where you can get it fixed. I just got the feeling that Luminox just doesn’t really care that much about their customers, just getting watches out the door. Google Luminox troubles and you’ll see what I mean.
So now I wear a cheap ($29.95) Casio. Have had it for about 2 years and it still is going strong. If it breaks, I just buy another one. No big investment but it has yet to fail me, unlike a Luminox.
Just my two cents.