Yeah, it's a very very bad buy, even at £599. You can get a computer about 3x faster for that kind of money. For example:
http://dinopc.com/shop/pc/AMD-870-Chipset-110p896.htm
AMD Phenom II X6 1090T Black Edition - this has 6 cores @ 3.2 ghz each (the PC world one has 2 cores, this one has 6!!)
Thermaltake Frio - this will be cooler and quieter than what PC world offers
8GB DDR3 1333mhz (2x 4GB) - that's double the RAM
1TB S-ATAII 3.0Gb/s - double the hard drive
NEW! ATI Radeon HD 6850 1GB - a graphics card probably about 5x faster
Xigmatek Asgard - upgraded case
£598.71 - Cheaper! You shouldn't be put off buying from the internet, nearly everyone (with sense) does it for the above Q.E.D reason