Can people post the links to the U Conn and the Khan material, and Alcumus? Is it...
http://www.gifted.uconn.edu/projectm3/
http://www.artofproblemsolving.com/Alcumus/Introduction.php
http://www.gottabemobile.com/2012/03/12/khan-academyl-this-ipad-app/

If I ran 2 kids 12 months, EPGY would be $4000, ALEKS $300, and Mathletics $200.

I'm not sure what is meant by comprehensive. Does it mean more drills? I think in lieu of comprehensive, I just keep feeding them more advanced grades material. I suppose I want them to race ahead to see the big picture.

This gets into questions of what and how to teach GT kids and I'm getting out of my depth. I mean in a few years I'd rather give them the Spivak Calculus text. "the only math book with a plot". That is the depth approach. I'd love to find a depth approach, a Spivak approach, an honors math, for the K - 12 maths.

http://www.amazon.com/Calculus-4th-Michael-Spivak/dp/0914098918