Comment Re:"the math of GR" -- how much math is that? (Score 1) 358
I can second the recommendation for Hartle (the title is Gravity: an Introduction to Einstein's General Relativity). It's a great introduction that I used as an undergrad, but be warned - it's still pretty complicated, even as an introduction. The nice part about it is that it develops the concepts of curved spacetime as you need them to investigate interesting physical systems, like the geometrized version of Special Relativity (which gets you time dilation and the Twin Paradox) or Schwarzschild black holes. My favorite section is where it discusses the metric of the entire universe, which describe the expansion of space and what happens to spacetime in the distant future.
As to Misner, Thorne, and Wheeler - avoid it until you've gone through some more introductory texts. It's really easy to get in over your head and get discouraged in that text, as they dive in head-first with hard-core math.