If you dont mind 50w chargers why not get one from hobbyking? Much Cheaper than what you linked...
4-port, 50watts - each port
http://www.hobbyking.com/hobbyking/s...dProduct=11170
Yet another 50watt charger, half the price of the one you linked...
http://www.hobbyking.com/hobbyking/s...w/_accessories
I use this one: 150watts - good for 8s lipo
OR 7a charge... and still cheaper...
http://www.hobbyking.com/hobbyking/s...lancer/Charger