There is no such thing as a hardcore gaming notebook, if you really want to take up gaming on the PC I suggest getting a desktop.
I would go even further in saying build your own desktop but I don't know if you are capable of that. A bad ass desktop (with monitor and everything else) would be the same price as a "hardcore gaming" notebook, maybe even cheaper.
That being said, the deciding factor should be, would you rather keep playing your console games and watching your movies on your old TV and get a bad ass PC or would you want the opposite?