Is this a good configuration or should I go with another one?

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1

CPU -AMD A10-7850K 3.7Ghz

Motherboard -Asus A88X-PLUS

RAM -G.Skill Ares DDR3 2133 PC-17000 8GB 2X4GB CL9

Hard Drive Disk (SSD) -Crucial M500 120GB SSD SATA3

PSU -AeroCool Templarius Imperator 550W 80 Plus Bronze

Case -Cooler Master K280 USB 3.0

It would cost me around 450 Euros.

2

Well, depends what this is going to be used for.  Assuming this is for gaming, a discrete GPU + CPU combo will get you a lot more performance.

http://uk.pcpartpicker.com/p/4TsTpg

3

+1. 

This will give you FAR better gaming performance.