You wouldn't live longer with SSA, but you would with one copy of the gene for it. Most recessive inherited conditions work like that, with one copy giving you some genetic advantage with the downside of two copies giving you a disease. Cystic fibrosis is similar, but for such a common mutation no-one has worked out what advantage being a CF carrier confers.
interestingly enough, research has shown that being a recessive carrier of CF carries protection against cholera, which was a major scourge in europe and scandanavian countries. which is why it is MUCH more common in whites than blacks.
and, you're correct, having one recessive copy of the sickle-cell gene carries protection against malaria, which is why it is MUCH more common in blacks.
additionally, having the thalassemia trait (common in mediterranean countries) is also protective against malaria, which is why you see a lot of greeks with thalassemia.
"the more you know . . . "