I don't know how much computers cost in Sweden.  However dual cores are old technology.  You should search for a quad (4 cores) and at least 6GBytes of DDR3 Ram memory.  If you buy and out of package unit like Dell etc, everything in it is balance with the right stuff.  In the U.S., you can buy one for under $1000 US.  That type of computer works extremely well with Poser, Vue, Carrara, and ZBrush.  The chips are Intel and I prefer those to AMD because they have a metal shield surrounding the chip giving one IMHO better EM shielding.  Jan