This has been my go to barber shop for past 2 years and have always left feeling great. They are located on the northeast corner of Durango and Windmill behind Bomas Bar.
Ashton's is a great classic barber with comfy retro styling chairs and homey decor they even have a kegerator!
Men's hair cuts cost $17 but it includes a straight razor shave around the edges with warm shaving cream. I have always been satisfied with the quality and professionalism of the barbers.
There are 8-9 barbers that work their and my suggestion would be to find one that you like and stick with them. They tend to be busy on weekends so I would call ahead or try as come in on a weekday.