EasyDriver for larger steppers?

I am in the planning stages of a larger robot and would like to use steppers for locomotion. The motors I have been looking at are in the 3A range but it appears that the ED can only handle up to 750mA. I have used the ED in the past and have been very pleased with how it works. Is there such a device for higher current steppers that I can supply a direction and step?

Tron