Zeph
Dan Mauch at Camtronics has a pretty good looking package of servos and power supply/nc controller hardware that is along the lines of what you are describing. 620 oz. in. servos, cables, powersupply , case, gecko 320/340 drivers, "the whole enchilada". Exceptionally nice looking stuff for around USD 1200/1300, complete and ready to assemble. Should be a pretty potent setup for a very versatile machine. find him at:
www.seanet.com/~dmauch/Products2.htm
Dan is also very knowledgeable and most willing to discuss your specific requirements to tailor your solution.