umrk,
Maybe its a good idea to get 3 seperate single axis boards. The total price is the same but if one blows its easyer to replace. Also, if you are good with electronics you can build them yourself with PCBs from thsengineering.com. I have played with a homemade PCB containing the same driver-IC (A3977) and it works quite well. These ICs are less than 6$ each! Lots of power and speed. Not as smooth as more professional drivers (such as geckos) though. But as you said, probably best bang for the buck right now.
greetings,
John |