The Westin Casuarina.  It's very close to the strip, without being on the strip.  (It's at the corner of Flamingo and Koval.)  If somebody is driving there it is very easy parking the garage, and more importantly, the walk from the garage to the elevators takes less than a minute and is probably less than 200 feet.  If visitors are taking a cab from a strip hotel it's close by (therefore the taxi fare will not be too much) and the walk from the main entrance to the elevators will take about 10 seconds.  

No security at the elevators, so your visitors can go right on up to the room.  The rooms are very nice.  (I stayed there once when I had a little too much to drink and didn't want to drive home.)

Casino is nice, small and unpretentious.  Restaurant is a little expensive, but the food is good.  

The one drawback is that this hotel usually doesn't have the $25 a night specials you can find at the places like the Sahara or the Tropicana (but those places are dumps).  Still, during the week you can generaly get a room for under $100 a night if you shop around on the travel web sites.

That's my 2 cents.

Isnt that a little high for Vegas? Hmmm. I may keep searching. Thanks everyone. Excited to become a regular there