Saxon math is certainly a good program, and many families have used it successfully. My daughter hated it, and I had to give it up mid-year. The point is, what works for your child may not be appropriate for mine. With a curriculum package, you have no choice in the matter; your child and you may become discouraged.
Here is a sample of the best math programs on the market today:
Saxon Math (www.saxonpub.com) Math textbook.
Key Curriculum Press (www.keypress.com) Math workbooks.
Miquon Math from Key Curriculum Press Manipulatives (cuisenaire rods or base 10 blocks) and workbooks.
Math-U-See (www.mathusee.com) Manipulatives, workbooks, and instructional video.
Calvert Math (www.calvertschool.org) Textbook/workbook with manipulatives.
Harold Jacobs Math (www.hsrc.com) Textbooks with clear descriptions of concepts.
Experienced parents know that with so many choices, it's really not in a child's best interests to limit curricula to only one provider. This is also true for literature, science, history, etc. I recommend purchasing teaching materials that accommodate your child's learning style. For instance, Saxon is very dry and repetitive. A child who likes drill and repetition, who can sit and concentrate easily, will do well with this method. Math-U-See is for a more active child who prefers a "hands-on" learning style and learns best by doing. Parents have told me Miquon Math presents math in a very clear, concise, easy-to-understand manner good for children who have difficulty grasping new concepts. Without knowing your child, it's impossible to recommend a specific program.
I suggest doing a lot of research and contacting major curriculum suppliers. Compare what is offered in each program, and how they best fit your goals. Talk with other parents and find out what has worked for them and why. I think you'll find the article, "Choosing a Homeschool Curriculum" helpful.