I ended up getting everything I needed from monoprice.com: The MDP-HDMI adapter, an HDMI extension cable and an audio cable...
I got it yesterday and 2 minutes later it was all hooked up! The quality is way better than expected! The stuff I watched yesterday from my computer onto my TV looked much better on TV than on the computer - I actually didn't know that what I was watching was in such great quality until I connected it to my TV.
So I'm definitely happy about my purchase! And I thank everyone for helping me out! And by the way, monoprice.com is awesome - fast delivery and package tracking all the way to my door basically (I always love it when I know specifically which day the package post man arrives... )..
If it wasn't for this weather, I'd be watching TV right now... :P Thanks guys - and especially thanks to Travis!