i don't know if this is the rigth place to post this but in all the years of xbox i used this guide
http://forum.xbmc.org/showthread.php?tid=53741 and it was just perfect in quality and in every way. it was named 720p/HD movies on your xbox... and haves a table for staxrip with max bitrates for resolution... so xbox does not brake... but now the post as been removed and i has just wanting to know if someone in here have that awesome table that saved my xbox
okay i have in my pc one of the resolution's for the 1280x720 -vbv 5978400,3866624,3866624 you just need to put these on codec configuration the advanced and just replace the value given, then use insane quality and just put the target quantizer for 3 the lower the better but it might get files over 4 gb try 2.8 and just go from there

put bidirectional codding in single adaptive. that's what i can remember from the post that helped me

and try it you will be amazed