Getting a 1080p monitor would be my first upgrade for that setup. Other than that, you're set for now.
Depending on what you do, you could either OC the CPU if you're not much into gaming or upgrade the GPU if you want to play more recent games that are graphics intense. Outlander's suggestion of choices for graphics card is good when you feel that the games you're playing have outgrown your GPU.
Welcome to the forums.