I feel like this is a troll thread, but I'll bite...
Do you really want to spend €6000 on a (presumably) gaming PC in the era of crappy console ports? Or did you mean €600...? Do you plan to do anything other than gaming on it? Do you need any professional features like maybe a top-end 10-bit wide gamut monitor and quadro card for photo work, etc.? Or maybe you're an audiophile and need to include some quality components in that budget?
Well, it's not for me to judge (maybe you have a source of unlimited income or something
), if you want to spend that much on gaming PC, just buy everything that's expensive... Even the top of the line socket 2011 platform with SSD RAID and Quad-SLI will fit in that budget. Or get an Eyefinity setup if you like.
If you need it for work, you need to say what kind of work you plan to do.