it depends on what you guys want to do/see during your time in vegas....do you want the stuff LV is known for? (casinos, shows, nightlife, restaurants) or do you want the outdoor stuff? either way, you can hit both of them relatively easily.
i hear good things about the lake mead cruises (desert princess, i think) and the spring mts, red rock canyon, valley of fire are always good outdoor options. the water show at the bellagio is definitely worth seeing....and per a suggestion from another thread (
http://www.city-data.com/forum/las-v...staurants.html) it might be worth following great days advice: "Eiffel Tower restaurant at the Paris - at dusk. Request a table for two by the window overlooking the Bellagio fountains"
hope you guys have fun.