So I have an 1.42 Power PC Mac Mini and I am wondering if its worth upgrading memory for better performance. I've had it for about 6 years or better but I have it connected to one of the classic clear flat studio monitors that I really like. We have an iPad(gen 1) and Black Macbook in the house too. Really only use desktop for word processing and kids to play educational games. The new Mini's are $500+ and are lacking an optical drive. Thoughts?