I just took over a high school program that would be considered an inner-city school. I started with only 7 guys and now I'm up to 18 but a few need a racquet but they don't have a lot of money. These guys are "beginners" to where I had to teach them how to hold onto the grip, footwork, etc. So they won't be able to tell the difference between frames and strings and what not. So what's a good racquet for beginners that's only $40-50?