IMO, if the ones you have shoot fine and you;re happy with their service, no need to get rid of them. Over the years I learned you get what you pay for, to a point. Nobody is goin to give you anything for free, quality wise that is. But it's a double edged sword. Some out there will try to sell you a piece of crap for a high dollar. You just have to look at what you're paying for. What you call a low end gun might be a top notch piece of equipment if it meeets your needs and works well.