kmplayer handles it's hardware resources far better than vlc. The difference becomes far more noticeable when you're playing 20gig plus mkv containered files at full 1080p. I use an intel i5 with 4gigs of ddr3 ram and a 1gig graphics card as a media machine and even that seems a little shy in the pants when I use VLC for hi-def playback. If for some reason you're not keen on kmplayer then you could also try media player classic which is a lot simpler than km. If you're looking for a media library app the you could try media monkey.
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