We are huge fans of the Red Rock Casino/resort. Great for locals yet has enough bling to attract visitors. Don't let the Flintstones vibe the exterior gives off fool you! Although we kinda like it :)
The hotel rooms are modern with an elegant touch. Must have been recently remodeled. Clean lines on the furniture but the colors are more on the brown and burgundy side. Its a nice change of pace from the Ultra White and Grey vibe you would get with the trendy strip hotels. We've stayed there a couple of times and the rooms have 40 inch flat screens, marble bathroom counters and a sizable bath tub.
If you are bored but don't wanna drive around town looking for food and entertainment, there are decent sit-down restaurants, a food court, as well as a bowling alley and movie theatre on the premises.
The pool is also pretty solid but definitely book a cabana where there's guaranteed shade. The summer sun is ridiculously dangerous here in Vegas.
If you are looking for a solid hotel that's off strip, give red rock a shot!