x264 (H.264) encoding for Pocket PC

I encode a lot of my music videos for viewing on my PPC. I used to encode to wmv until recently trying out x264. It gives much better quality at the same filsize. However you'll need a player such as CorePlayer v1.1 (commercial) to play them. (Anybody know of any good open-source PPC player for x264?)

I use MediaCoder (superb new open-source tool) for encoding. here are the settings I use:

- size=320x240; fps=15
- Audio: Nero HE-AAC, Target Quality; quality=25 (20-25 ok)
- Video: H.264,mp4, x264, quality based, quality=45 (40-50 ok)

video encoding command line:
".\codecs\x264.exe" "$(SourceFile)" --progress --no-psnr --no-ssim --thread-input --keyint 250 --bframes 3 --level 51 --direct spatial --crf 27 --threads auto --subme 5 --ref 1 --weightb --trellis 1 --me hex --merange 16 -o "$(DestFile)"

audio encoding command line:
codecs\neroAacEnc_SSE2.exe -q 0.25 -he -ignorelength -if - -of "$(DestFile)"

(please share any settings you might be using for your encodes..)