Help me search for the right thing, audio amp

I am looking to build a small amplifier circuit and while searching i realized that i am not completely sure what im looking for.

So let me first explain what im doing!

I am trying to have a way of tapping into my analog red/white rca connections from my xbox 360 into the tv and using that signal in a small amplifier that will power a set of headphones.

tv ----- T---xbox | | | and over by my bed the box with headphones

while searching i came up with this page of all sorts of diagrams but im not sure which one is best.

http://www.discovercircuits.com/A/a-audioamp.htm

Im leaning on this particular one but again i am unsure if this is the best path.

http://gilmore2.chem.northwestern.edu/projects/showfile.php?file=cmoy2_prj.htm

Any input is greatly appreciated.

BTW, I am aware this is not arduino related but i figure its close enough and its really the only dev forum im active on right now.