Playing movies.. best rate to encode at?

[MattOktaNZ]

I watch movies on my Vogue when I want to watch an action flick that the girlfriend doesn't and I can't be bothered firing up the laptop.

So.. Whats the best rate/format to encode in?

So far i use MediaCoder and encode at 320x240/xvid-Mp4 video and AAC audio, 15fps. This gets 700mb movies down to 200mb odd. And I watch them with TCPMP.

Does changing the 15fps to 25fps increase the cpu load and decrease battery life?

Is AAC or MP4 audio the best encoding to use?

Anything else I'm missing?