$2,000 would buy more than a decent system today, $500-$1,000 will buy a smart upgrade after several months-year, $1,000-$1,500 will upgrade it completely in 1.5-2 years, then it will be faster than the $7,549 configuration, you get three purchase satisfications instead of one and will save at least $3,000.

A quadcore for games is just throwing away money at this point.