Or if you do not want to have to remove the center diff to easily adjust the gear mesh, change pinions or service the motor you can get.
http://www.elitercd.com/index.php?op...&id=5&Itemid=2
I have used both mounts on my MBX6E and the difference is HUGE!
the Elite mount also has a space to put an optional extra bearing (size the same as a gas clutch bell bearing) to distribute wear, load and stress to prolong the life of your more expensive motor bearing, as well as itself acting as a dust guard to the original bearing. This mount is strong as a rock and the motor actually stays put better than the RC monster mount. Motor swaps are a breeze too. Just be sure to get either the Robinson racing or HPI shorter pinions for that Elitercd motor mount.
Then the RC Monster battery trays break alot. (buddy & I went thru 5 of them at over $250usD to learn that lesson). If you got a Associated, Losi, Kyosho or Ofna hyper 9E battery tray for about $15 USD (haven't broke one of them yet), your still getting better quality mount and tray cheaper than that RC monster combo.