I'm surprised no one has mentioned running dirt shields instead of shock boots.
You can run some trick carbon stuff like this;
http://www.xtremercracing.com/Store_...ue&SnipID=6773
http://www.redrc.net/2010/05/de-raci...8t-mud-guards/
Or just get a sheet of thick lexan and cut you own out for the front and rear.
For me they are better than shock boots as you keep the crud off the a-arms as well.