I use the Dick Smith 3 amp regulated variable output power supply below on my EQ6 Pro with 10 inch Skywatcher Newt plus camera .... around 15kgs all up .... with no problems. I have an EQ5 as well which runs on 6 volts so I wanted the variable output model. There is another model M9940 which is 12 volts dedicated for about $5 less.
http://www.dse.com.au/cgi-bin/dse.st...uct/View/M9941
Another thing about this power supply is the leads can be replaced should they get damaged and they have interchangeable connectors to suit different devices should you want to power something else.