If your bike bothers you to the point that you don't want to ride it or if it doesn't fit well, then get a new one. But realistically, if you aren't racing, then it won't matter. If you are still trying to get into shape and still learning how ride singletrack it is better to wait. As you get deeper into the sport, you will have a better understanding of what you want and need...especially if you are going to drop 1000-3000+ on a new one.