I'm checking into "My Father's World" curriculum. From what I've read on their website, it seems to be well-rounded and interesting. It does have to be supplemented with a separate math curriculum. I've been thinking of switching from Saxon (we did 1st grade last year and hated it) to either Singapore or Math-U-See.
The curriculum website is www.mfwbooks.com
I have not used MUS, but I have heard that it does not necessarily follow the scope and sequence that most states follow. So keep that in mind if you are in a state where you have to do standardized testing.
We use Miquon Math which is very similar to MUS and Singapore Math. I am astonished and amazed at the math that takes place in our home! We would never had the results I have seen if we had kept our son in the school he was in (which a private school) or in a pubic environment.
At first I was intimidated by Singapore Math, but we have come to really like it.