I'm also in my 40's...of your list I'd probably opt for the
Luxor. I enjoyed the food at the two places I ate there (don't remember the names, one was a steakhouse and one was Pan-Asian). Some might find the Egyptian theme a little cheesy, but I enjoyed it for what it was (hey, it's vegas!). It felt like a relative bargain, being right on the Strip in Vegas, and the hotel wasn't so monstrously large that I felt intimidated to go anywhere but my room for fear of never finding my way back. I like that in a hotel.