I have to disagree about Savs being a better first time larger lizard. Tegus seem to be much more forgiving of husbandry mistakes than the Savs are. They tame very easily and don't necessarily have to be handled alot to be docile. I have adult Tegus that were handled not more than a few times a month that are wonderful animals and used for educational presentations. They just naturally seem to calm down as they gain size and age.
There are a couple of drawbacks to keeping Tegus. They may choose to hibernate for months in the wintertime which makes them a pretty poor excuse of a pet. The also eat enormous amounts of food....be prepared to stock a freezer FULL of rodents. To me, their amiable personalities and stunning appearance makes it more than worthwhile to keep a bunch around.