Excellent thread guys! About time we got this stuff out in the open!
A fellow clan told me (and I confirmed) that JIP Lag and CPU stress are increased when you increase MinBandwidth/MaxBandwidth to those values.
Judging from watching stats while playing games, bandwidth per player ranges between 256kbps and 512kbps. Depending on your average missions, you want to use those numbers to work out the values. Currently I'm using the following: