I use Abeka for history, science, and spelling, and used to use Horizon for math. You may want to check out other Alpha-Omega stuff. It's good, Christian curriculum, as is Abeka, though I wouldn't recommend Abeka's math.
Here's a really helpful hint: in big cities, there are actual homeschooling conventions where you can get curriculum and supplies.
One last tip: If you don't want a to spend hundreds on curriculum, go to Ebay and search for the type of curriculum you want. You can get the same stuff for much less.
I hope that helps. Good luck!
I don't have any immediate homeschooling needs but if I ever do, I thought I'd give Art's system a go.