McCarran is a perfectly fine airport for Las Vegas. It's close to the strip, there are always plenty of taxis, and if you get stuck waiting on a flight, there's free WiFi. Also, it's clean, with plenty of food and beverage options. I prefer the Delta terminal over the Southwest one, mostly because Delta's seems more open, with more upscale amenities. SW can get overcrowded and a little ripe from time to time.
Hate the taxi lines at Terminal 1? Do yourself a favor and take the train to Terminal 3, where the International flights arrive. As long as you don't need to go to baggage claim, and there hasn't been a rush of foreign arrivals, the taxi line is practically nonexistent. I was off the plane and at my hotel less than an hour from landing.