2011 has seen a number of automakers release brand new sport utility vehicles that significantly improve on the models that they are replacing. In addition to their design tweaks and upgrades, looming corporate average fuel economy regulations have led to a serious investment in more efficient drivetrains in almost every one of these models. In some cases the changes are dramatic, while certain other automakers offer a more evolutionary take on their refreshed vehicle platforms. Let's take a look at five brand new sport utility vehicles for 2011.