Sadly you have to look around and after you find your best then make the decision and then stop looking. It's a rule that you will always find a better deal the next day.
The model you noted is a fine selection of CPU and such for general use but not for gamers.
Trying to get the most bang for your buck laptop with a budget of 350-450euros (450-600usd)
I've found this lenovo g500 - http://www.amazon.co.uk/gp/product/B00DPES316/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE
but are there any better alternatives?