Okay, thanks a lot, will go with this one then.
Would this one be better? Antec CP 1000W Modular Power Supply [0761345-06101-8] (only 10£more)...
System then:
*Intel Core i7 950 3.06GHz (Bloomfield) (Socket LGA1366) - Retail
*Asus P6X58D-E, Intel X58, S1366, PCI-E 2.0 (x16), DDR3 2000 (OC), SATA 6Gb/s, SATA RAID, ATX
*1280MB Asus GTX 470 V2, 40nm, 3348MHz GDDR5, GPU 607MHz, Shader 1215MHz, 448 Cores, 2xDVI,mini HDMI
*Antec TruePower New Modular 750W Power Supply
*Coolermaster CM 690 II Advanced, Black, Mid Tower Case w/o PSU
*1TB Samsung HD103SJ Spinpoint F3, SATA 3Gb/s, 7200rpm, 32MB Cache, 8.9 ms, NCQ, OEM
*Geil Black Dragon 6GB (3x2GB) DDR3 PC3-12800C8 (1600MHz) Triple Channel (GB36GB1600C8TC)
*Samsung SH-S223L/BEBE 22x DVD±RW SATA Lightscribe ReWriter (Black) - OEM
*Zalman CNPS10X Flex CPU Cooler (Socket 754/939/AM2/AM2+/AM3/775/1156/1366)