K-lite vs. ACE Mega Codecs Pack

Hi!
I`m new here and I have only a little knowledge about codecs. To start off I would want to know, which one of these codecs pack to install. Other options are welcomed too.

Generally this would solve most problems for most people I think:

Install xvid video codec
Install divx video codec (the free package is more than enough)
Install AC3 audio codec

With these codecs Windows Media Player should be able to play most files.

Alternatively:

Try VideoLAN VLC Media Player which do not require the codecs mentioned as it is a media player with divx/xvid/ac3 and many more formats decoding built-in.

All the mentioned codecs/media players can be downloaded from moviecodec.com

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