Those are some pretty nice steppers for the price. I think 130oz is good power to have for hobby cnc routers. (I assume it is for that, maybe I am wrong.) Some people throw as much power into as possible but it only makes the motors, control and mechanics more expensive!
If you are into CNC you can look at my homemade CNC at http://www.colinmackenzie.net
. I am very partial to the Gecko stepper controllers, there are a lot of nice features on them. Be careful of a lot of controllers, especially the ones sold on ebay, they state the max amperage of the parts from the datasheets but it's not a true reflection of what they can truly source. (I got jammed on that one, my 1.5amp steppers were killing my L293 based controller rated at 3A.) Geckos and Vipers are instead somewhat under-rated and use FETs that specify around 20amps or more.
If you are in to spending the time making your own from an instructable that's a good exercise, but it's definately not a savings from the time is money standpoint by any means. Make sure the schematic or pcb source is good too. I've found motor control circuits that just couldn't work online.