Which is the best?

I get macroblocks whenever I get into hi motion areas, but my low motion looks good right now. Here's my settings:

bitrate: 950 kbps
max quantizer: 15
min quantizer: 2
rate control averaging period: 2500
rate control period: 8
rate control down/up reaction: 25

Anyone know what settings I should use with Divx 4 to get a nice, clean encode?

-Leo