Go for the MacArthur study bible. Any tough passage I've run into, there's a satisfying answer. The eschatolagy will be a touchy issue, but...

After owning one for over a year, I can't imagine not having it.

Also, there's no concordance, but a topical index which is at times handy and at other times annoying. Maps, an overview of theology (basically the GCC statement of faith), etc.


(Latin phrase goes here.)