Our 2000 Solara was totaled in a head-on collision. The front end crumpled just like it should; airbags went off. My wife had a bruise from the seat belt. We went out and bought another new one, a 2001. I consider it a very safe car.
The only innovation that you might consider is that newer cars have side curtain airbags, Our 2005 Corolla does. At your current rate of use, you won't need to replace this car for 30 or more years. But if safety is your only concern, then now is the time to try to find a 2008 Solara since they aren't making them for 2009. I've considered it myself and will likely end up going to a Lexus in a few years if they have one with similar styling then. Two door models look great and we very rarely have had anyone use the back seat.