Forge World gives your Marines a bit more firepower with the Diemos pattern Predator tank.
From the release:
The Predator is a highly effective medium tank designed to provide Space Marine detachments with heavy fire support in the heat of battle. An ancient and revered design, cited by the Codex Astartes as a spiritual mentor, no less, there are almost as many patterns of Predator as there are of the ubiquitous Rhino hull it is based upon. One such variant is the Deimos Pattern, manufactured in the vast forges that occupy the moons of Mars.