New PC

[Warhound]

Agreed with U505.
Personally I would save 50€ on the motherboard by taking an ASUS P8Z77-V LE, another 50€ by going for a i5-3570K and 35€ by using onboard sound/dumping the X-Fi.
This leaves you 135€ which you'd ideally put towards buying a GTX 660 when it's released later this month or possibly September. Or get a 7950 if you can't wait.
I'd definitely go for an Ivy Bridge CPU so you can enjoy PCIe 3.0 if you upgrade the graphics card later on, it doesn't really matter now but will with feature GPU generations.
And don't go for a graphics card with less than 2gb of RAM.