Have a look in the Router build Log section, there's lots of builds there. Some good ones to look at showing what equipment they used...in no particular order...
http://www.mycncuk.com/forums/gantry...-building.html
http://www.mycncuk.com/forums/gantry...eady-eddy.html
http://www.mycncuk.com/forums/gantry...g-machine.html
http://www.mycncuk.com/forums/gantry...ation-cnc.html

Irving's motor calculator to size the stepper motors you need: http://www.mycncuk.com/forums/machin...do-i-need.html

Control box/electronics/diagrams:
http://www.mycncuk.com/forums/genera...outer-cnc.html
Eddycurrent's build log has his electrical schematic in it http://www.mycncuk.com/forums/gantry...html#post52213
http://www.mycncuk.com/forums/genera...ic-advice.html

There are lots more if you search through the forum but those should give you something to go at......