The Altima coupe is a tank and doesn't handle extremely well "out the box".

But it does cruise on the highway quite well. And is actually pretty quick from a stand still considering the car's characteristics.
You may wish to consider getting an aftermarket rear sway bar and end links and/or coilovers if you want to improve the cars stability and handling a tad bit. You can always considering adding an aftermarket catback too...if you dont mind adding extra sound to the car. A lot of folks seem to be happy with adding an aftermarket intake to open up the engine's sound output during hard acceleration.
I personally like the quite sound of the coupe and will upgrade the suspension this spring.