Monergism.com is by far the most helpful theological resource available on the web, in my opinion. It is filled with God-centered articles and sermons. Monergism has established, or is in the process of establishing the Hall of Contemporary Reformers. Right now it consists of White, Piper, Sproul, Keller, Ferguson, MacArthur, Mohler, Mahaney, Horton, Carson, and Dever. That is a serious line up of Theocentric theologians! You would do well to get familiar with any or all of these men. I was going to mention my three favorite, but I just can't do it. They are all too good. They range from baptists to presbyterian, from cessationists to charismatic, and from professors to pastors, but the main thing they have in common is that they are all biblical (reformed) in their view of salvation. Enjoy!