I'm still a little confused in regards to 4 cores and 6 cores.

Can someone explain this?

Will the build I suggested work fine for what I use my computer for (see below)

?
I use my computer to play games like Torchlight or The Witcher and the only online games
I play are at the Gamesville site or at Pogo.
I like to watch music videos (downloaded ones) or streamed ones (movie trailer or music videos)
I use a jukebox program to play my mp3's.
I catalog my postmark collection with a simple text program and program.
I also use it to rip songs from my music CDs and to make music CDs.
As far as multi-tasking goes, I would like to be able to rip songs from CDS, listen to music with my
jukebox program and log my postmark collection at the same time.
If I need a better build please give me some suggestions!!!!